若函数f(x)=x-1x(x＞0)的反函数为f-1（x），则f-1（-2）=__

小明对蔚蔚说：“蔚蔚，你现在在脑子里想好一个整数，然后将这个数乘2加7，把结果再乘3减21。”蔚蔚按照小明的要求做好后，小明很得意地告诉蔚蔚说：“现在你所得的数一定是6的倍数。”蔚蔚非常惊讶，但很快明白了其中的道理，亲爱的同学，你能告诉大家是为什么吗？请你也像小明一样编一个类似的游戏，并说明其中的道理。

维生素B1的吸收部位是（）

A.口腔

B.胃

C.小肠

D.升结肠

E.横结肠

烟草业仍然利润丰厚，预期也显示这种情况将继续保持。今年在美国，从烟草农场主那儿卖出的烟草总量增加，尽管抽烟的成年人减少了。
以下各项，如果正确，可以解释烟草销量的增加而同时抽烟成年人数量的下降，除了：

A．今年开始抽烟的女性的数量超过了戒烟的男性的数量。

B．今年开始抽烟的青少年的人数超过了同年戒烟的成年人的人数。

C．今年，原来不抽烟，但是开始嚼烟和吸鼻烟的人数，超过了戒烟的人数。

D．继续抽烟的人，其人均烟草消费量高于过去。

When Emily Beardmore first heard that a trip was being planned by the biology class at Windsor High School, she thought about how much fun it would be.

“I thought it would be a really good experience to go with other friends and teachers to another country in an environment other than a vacation environment,” the 17-year-old girl said.

A few months later, Emily got her chance when she and 14 of her classmates, along with biology teacher Tamara Pennington went to Costa Rica for eight days in late May.

“It was not just a tour,” said Pennington, who organized the trip. “You can go any place in the world on just a tour. This one was really working with the sea turtles (海龟) and practicing conservation(保护). It just seemed like the perfect science field trip for kids who think they want to get into science to see what it's really like to be out in the field and enjoy themselves.”

Emily said her time on the turtle program, which was the focus of the trip, was “crazy.”“We were walking on the beach at night and you can’t see anything—just see a big black dot.” She said with a laugh. “I was not expecting the turtles to be that big.” The turtles are leatherback turtles, which are becoming extinct (灭绝) because their eggs are used as food.

“When they would move their legs while laying their eggs they were really hard to control because they were a lot more powerful than you would imagine,” Emily said.

Once the eggs were collected, the students took them back to a hatchery(孵化场) and dug holes to copy the hole the mother turtle had made and then buried the eggs for the 60 days needed to hatch.

“The experience was so cool,” Emily said. “You go to another country to see what their culture is like and learn what their everyday lives are like. It made me really want to help out my mom a lot more than I do, and value what I have.”

小题1:What did Pennington consider the trip to be?

A．It was a common tour to a foreign country.

B．It was a journey to practice what students learned.

C．It was to attract students’ interest in science.

D．It was a trip to do practical science activities.小题2:From what Emily said on her turtle program, we know that     .

A．she was afraid of walking on the beach at night

B．she didn’t dare to catch the powerful turtles

C．she had thought turtles were small animals

D．she got crazy at the sight of turtles at night小题3:What did Emily learn from her experience?

A．She learned to be grateful to her teachers.

B．She understood the importance of what she had.

C．She realized the beauty of foreign culture.

D．She knew the importance of everyday life小题4:What would be the best title for the passage?

A．Teens Help Fight Turtle Extinction.

B．Teens Take a tour to Costa Rica.

C．Teens Have a Research on Turtles.

D．Teens Learn to be Independent.

有关会阴部手术后病人导尿管的护理，错误的是()。

A．根据手术范围及病情需要，导尿管分别保留2～10天

B．保持尿管通畅，严密观察尿液的量及性质

C．每天冲洗尿管和膀胱

D．保留尿管期间，每日更换尿袋

E．更换尿袋时要严格遵守无菌操作规程