某一细胞群体杀伤肿瘤细胞机制为：①释放溶酶体酶直接杀伤；②ADCC效应；③分泌TNF

下列4幅表示地球绕日公转的示意图，正确的是（   ）

A．①②

B．②③

C．②④

D．①④

一般资料：女性，30岁，大学毕业，工厂技术员。 主要问题：婚姻冲突，丈夫外遇，想离婚又怕影响孩子，对丈夫充满怨恨，情绪低落一个月。心理咨询师在了解了求助者的基本背景情况后，决定对其采用合理情绪疗法，下面是咨询过程的片断。 心理咨询师：你觉得是什么原因使你一直处于目前这种情绪状态中 求助者：那还用说吗我们俩经常吵架，他一点也不关心我……还有比这更糟糕的事吗 心理咨询师：这些都是你生活中发生的一些事，但它们可能并不是你情绪低落的直接原因。 求助者：那是什么原因呢 心理咨询师：是你对这些事的一些看法。人们对事物都有一些自己的看法，有的是合理的，有的是不合理的，不同的想法可能会导致不同的情绪结果。如果你能认识到你现在的情绪状态是你头脑中一些不合理的想法造成的，那么你或许就能控制你的情绪。 求助者：(沉默)怎么会是这样呢 心理咨询师：你知道塞翁失马的故事吧，塞翁总是能在遇到灾难时保持乐观，为什么呢 求助者：他与别人想的不一样。他的马丢了，别人劝慰他，他说可能会是好事，所以并不难受。 心理咨询师：那你觉得有些情绪是不是因为有些想法决定的呢 求助者：的确是这样。看样子我的问题也可能是因为我的一些想法在作怪。 心理咨询师：就你的问题来说，别人也可能遇到。夫妻吵架，情感不和，这在夫妻间是常见的事，但并不是每个人都像你现在这个样子，为什么这样呢 求助者：难道是我与他们想的不一样可我不知道我的想法里有那些不合理的地方。我对他很好，给他做饭，洗衣服，使他高兴，总之我尽到了一个做妻子的责任和义务。可是他呢他从来不耐烦，从来不爱我，从来没个笑脸，嫁给他算是我瞎了眼了! 心理咨询师：你是说你丈夫必须像你爱他一样爱你，是吗 求助者：对，他必须，也应该这样做。 心理咨询师：你有什么理由要求他必须这样做呢 求助者：因为他是我丈夫，就应该爱我。

在这段咨询的最后几句话中，心理咨询师主要是在帮助求助者( )。

A．改变不合理信念

B．寻找不合理信念

C．对抗不合理信念

D．建立合理的信念

甲乙互负债务，甲对乙所负债务为人民币800元，乙对甲所负债务为粮食150斤，下列说法正确的有（）

A.这两项债务不可抵销

B.这两项债务可以抵销

C.这两项债务可以抵销，但须经双方协商

D.这两项债务经任何一方主张就可以抵销

连续几年酗酒即可造成肝损害（）

A.2年

B.3年

C.4年

D.5年

Unforgettable Olympic Moments

Since French baron Pierre de Coubertin gave fresh life to the Olympic movement in 1896, the Games have been witness to some of the most unforgettable moments in sports. Some of those moments have been dazzling athletic achievements. Others have been moments that organizers would have preferred never happened. But good or bad, these events have helped create the memories that shape our perceptions of the Olympic Games to the present day. So here, in no particular order, are seven unforgettable moments from the Summer Olympic Games.

Jesse Owens---Berlin 1936

In 1936, Nazi Germany played host to the Summer Olympics, and Germany’s Adolf Hitler was determined to prove the superiority of the Aryan race. African-American track star Jesse Owens, a son of a sharecropper and the grandson of slaves, had other plans. In a display that dealt a tremendous blow to the Nazi’s racist ideology, Owens won the 100-meter dash, the 200-meter dash and the long jump. He was also a key member of the 400-meter relay team that won the gold medal. He set records in three of those events. He was the first American to ever win four medals in an Olympic Games.
But as Owens himself later noted, his single-handed destruction of Hitler’s myth of Aryan superiority did little at the time to advance the cause of African-Americans in the US.
"When I came back to my native country, after all the stories about Hitler, I couldn’t ride in the front of the bus," Owens said. "I had to go to the back door. I couldn’t live where I wanted. I wasn’t invited to shake hands with Hitler, but I wasn’t invited to the White House to shake hands with the president, either. "

The Soviet Union-USA Gold Medal Basketball Final--Munich 1972

It was as bad a call by officials as has ever been made in a sporting contest. The 1972 gold medal basketball game between the United States and the Soviet Union was a real squeaker, but it looked as if the Americans had pulled it out. But that was not to be, as long-time Monitor sports writer and now sports blogger (博客) Ross Atkins recalled recently:
After the US appeared to have kept its perfect Olympic record intact and escaped a huge upset by the Soviets in the men’s final, the referees twice decided to put three seconds back on the clock. The Soviets managed to score the winning basket on the second replay and win the gold medal. Distraught by what they considered an injustice, the members of US team voted unanimously to refuse their silver medals. They’ve never reneged, and to this day the medals sit in a Swiss vault.
How seriously do the American players who played on that team take this boycott Team captain Kenny Davis actually placed in his will a request that his wife and children can never, ever receive the silver medal from that game.

Ethiopian Abebe Bikila Wins a Gold Medal While Running Barefoot--Rome 1960

Abebe Bikila was a young member of the Imperial Bodyguard of Ethiopia when he ran the marathon in the 1960 Games in Rome. Up until that time, no black African had ever won a gold medal in the Olympic Games, let alone a prestigious track and field event like the marathon. But Bikila, running without his shoes in the chilly dawn of a Roman summer day, broke that dry spell, and set a new world record at the same time.
It was fitting that his win came in Italy, the nation that had invaded his homeland three decades earlier. His feat captured the imagination of the entire world. Four years later in Tokyo, he repeated it, becoming the first man to ever win gold in two Olympic marathons (a feat only duplicated once).
He also established a trend that has to this day dominated long-distance events around the globe: the superiority of runners from eastern Africa.

Mark Spitz’ Seven Gold Medals’--Munich 1972

Before anyone had ever heard of this year’s hyped Olympic swimming hopeful, Michael Phelps, there was an even greater sensation in the pool: Mark Spitz. Spitz promised he would win seven gold medals at the 72 games in Munich, Germany.
Not only was he as good as his word, winning four individual and three relay gold medals, but he also set, or helped set, a world record in each race. No athlete in any discipline has come close to matching his performance.
In 1990, 18 years after his Olympic medal spree, Spitz announced he planned to try to qualify for the 1992 Barcelona Games in the 100-meter butterfly. But he did so poorly that he announced that, once and for all, his swimming days were over.

Ben Johnson Loses Gold Medal in Doping Scandal--Seoul 1988

It was arguably Canada’s greatest athletic achievement when Ben Johnson raced across the finish line first in the 100-meter dash at the 1988 Seoul Olympics, making him the "fastest human being ever". Within two days that joy turned into one of the Olympics’ most disappointing moments, when Olympic officials announced that Johnson had been disqualified because he had tested positive for steroid use.
After Johnson, Olympic organizers could no longer avoid the fact that many top athletes were using drugs to help them win. The cat-and-mouse game between athletes and Olympic officials over the use of performance-enhancing drugs continues to this day. But at the 9.004 Games in Athens, there will be a new wrinkle--along with urine, the blood of gold medal wining athletes will also be tested, which is "considered a huge threat to cheaters".

Bob Beamon Jumps 29 Feet--Mexico City 1968

For many Olympic enthusiasts, it is the single greatest athletic achievement in Olympic history. In 1968, US long jumper Bob Beamon won the gold medal at the Games in Mexico City in a jump that didn’t just break the old world record, but completely destroyed it.
His wining jump, (29-ft, 21/2 inch. ), shattered the old mark by nearly a feet. Beamon’s record was finally broken by 2 inches in 1991 by US athlete Mike Powell.
One little known fact is that a few months before the Mexico City Games, he had been suspended from the University of Texas--E1 Paso track team for refusing to compete against Brigham Young University, a Mormon college, which at that time had what Beamon considered racist policies. This meant he had to train for the games without a coach, so former Olympian Ralph Boston Coached him unofficially.

Nadia Comaneci’s Perfect Scores---Montreal 1976

She was the first perfect ten. Romanian gymnast Nadia Comaneci simultaneously amazed and stunned the sporting world during the 1976 Games in Montreal when she scored the first perfect marks in Olympic gymnastics--in fact, she was awarded seven perfect marks during the competition. The diminutive star went home with gold medals in the all-round competition, the balance beam and the uneven bars. She won two more gold medals in the 1980 Moscow Games.
But once she returned to Romania, Comaneci’s life became almost unbearable as she suffered under the regime of Nicolae Ceausescu. She fled the country secretly in 1989 (literally in the middle of the night) and now lives in the US with her husband, former US Olympic gymnast Bart Conners, whom she married in 1996.

Owens noted that his destruction of Hitler’s myth of Aryan superiority contributed to advance the cause of African-Americans in the US.