题目:
广州话“有乜冬瓜豆腐”,正确的意思是()。
A、有什么好吃的
B、生活简朴
C、有什么好介绍
D、有什么三长两短
答案:
参考答案:D
广州话“有乜冬瓜豆腐”,正确的意思是()。
A、有什么好吃的
B、生活简朴
C、有什么好介绍
D、有什么三长两短
参考答案:D
《咳论》“五脏六腑皆令人咳”,但关系最密切的是()。
A.心肺
B.肺肾
C.肺脾
D.肺胃
E.肺大肠
在帮助老师整理实验仪器和药品时,某小组同学发现氢氧化钠试剂瓶瓶口有一些白色固体物质,他们认为可能是氢氧化钠变质了,为此它们进行了下列探究活动.请你一同参与并解答相应问题:
[查阅资料]
①氢氧化钠溶液露置在空气中易吸收二氧化碳而变质,但无明显现象;
②碳酸钠溶液的pH>7.
[提出问题]如何检验在空气中露置一段时间的氢氧化钠溶液是否变质?
(1)用A、B、C三支试管,分别取等量露置过的氢氧化钠溶液,进行实验:
试管 | 滴加试剂 | 观察到的现象 | 实验结论 |
A | 石蕊试液 | ______ | 没有变质 |
B | 足量稀盐酸 | ______ | 已经变质 |
C | 氯化钙溶液 | ______ | 已经变质 |
①一定发生的反应______;
②可能发生的反应______.
(3)很明显,他们的结论是矛盾的,你认为根据试管______(填A或B或C)的现象做出的结论肯定是错误的,理由是______.
(4)如果确定原氢氧化钠溶液已经变质,若要进一步测定放入试管的溶液中变质的氢氧化钠的质量,实验中他们需要测知的实验数据应是______.
D
His first fight was for the equal rights of black people in South Africa. Then, as the first black president he fought to unite the country and organize the government. Now Nelson Mandela has set his sights on a new enemy, AIDS.
On March 19 the 82-year-old, former president, hosted his second AIDS-awareness concert. He warned that 25 million people in Africa were already infected with the fatal disease.
Mandela was born in a small village in South Africa in 1918. He was adopted (收养) by the chief of his tribe (部族) and could have been a chief himself and lived a happy country life.
But he refused to be a chief when his people lived under racial discrimination ( 种族歧视). He decided to fight for equal rights for all the people in South Africa. Before 1990, under the country’s Racial Segregation Law (种族隔离法), colored and white people lived separately. Black people were treated unfairly even when taking a bus. Blacks had to stand at the back of the bus to make room for white people even when there were only a few of them on board.
For his opposition (反对) to the system Mandela was arrested (被捕) and spent 27 years in prison. He was freed in 1990 and become the president of the country after the first elections were held in which everyone could vote.
Mandela was not only a political fighter who attacked with speeches. He was also a trained boxer (拳击手) and fought in the ring when he was young.
“ Although I did not enjoy the violence of boxing, I was interested in how one moved one’s body to protect oneself, how one used a strategy both to attack and retreat (撤退),” he wrote in his autobiography.
As a skillful fighter, he chose music as his weapon against AIDS. He hopes to win another victory against AIDS.
52.Nelson Mandela succeeded in doing the following except _____.
A. winning the equal rights for the black people in South Africa
B. uniting South Africa
C. organizing a government in South Africa
D. controlling the spread of AIDS
53.If Nelson Mandela hadn’t fought against racial discrimination, he _____.
A. could easily have been the president of South Africa
B. could still have lived a happy life
C. could have been in a difficult situation
D. would have been an excellent boxer
54.It can be inferred that Nelson Mandela _____.
A. continues to help the black people with the political struggle
B. is taking a position in a music group
C. is taking on the world’s greatest fight against AIDS
D. is preparing for the next election of president
55.Which statement can best describe the life of Nelson Mandela?
A. Struggle is his life. B. Sports make his fame.
C. Fight for equal rights. D. Great fighter against government.
秦岭--淮河以南的农村生活、生产一般是( )
A.耕地以旱地为主,一年二到三熟
B.农作物以小麦、高粱为主
C.捕鱼捞虾、栽培菱藕、采桑养蚕
D.冬季孩子们喜欢堆雪人、打雪仗、滑冰
搭设钢管井字架用的旋转扣件是用于()。
A.连接扣紧两根任意角相交的杆件
B.连接扣紧两根垂直相交的杆件
C.连接两根杆件的对接接长
D.连接扣紧两根水平相交的杆件