无数原生质体相互连通形成一个连续的整体，是依靠（）。 A.微纤丝 B.微管 C.胞间

在细胞膜的物质转运中，Na⁺跨膜转运的方式是

A．单纯扩散和易化扩散

B．单纯扩散和主动转运

C．易化扩散和主动转运

D．易化扩散和受体介导式入胞

E．单纯扩散、易化扩散和主动转运

如果风险资产组合有60%的把握获得15%的收益率，40%的把握获得5%的收益率，而国库券可获得6%的收益率，那么，风险资产组合的风险溢价是：

A．11%

B．1%

C．9%

D．5%

阅读理解。

     High school could be a scary time for everyone. The school seems bigger; there are more kids and it's a

totally new environment. In fact, it isn't that bad.

     High school is a lot like middle school after a while. The first day of course is always scary, and the first

day of middle school must have been the same. Of course, the first few days you might get lost while looking

for your classes but after a while, what seemed to be a large school really isn't.

     One thing that's really cool about high school is that there are so many more classes you can take. If you

happen to like art, there are many art classes. In addition, there are other classes that weren't available in middle

school like photography or psychology.

     In high school, there are a lot of things that are similar to how middle school was but at the same time,

there are other opportunities available as well. There are more clubs, sports, and other activities you can join

in.

     You're able to join in these activities and make new friends with kids with the same interest as you. These

activities also give you a chance to learn something you never had the opportunity to learn before.

     High school has something for everyone. You just have to decide what to take part in. but there's one thing

that's certain that you're going to have just as much fun in high school as you did in middle school. And if

middle school wasn't that great for you, high school is a chance to make up for it. 

     High school isn't just about having fun though. You have to be responsible while you're growing up.

Teachers aren't going to chase (催促) you up to do your homework.

1. The passage is mainly about _____. [ ]

A. high school life

B. how to take art classes

C. the fun side of high school life

D. how to make new friends in high school

2. In the author's opinion, high school life _____. [ ]

A. is a scary time for everyone

B. is full of fun without any worries

C. is the same as middle school life

D. is as much fun as middle school life

3. It can be inferred that you can do the following things in high school EXCEPT _____. [ ]

A. making more friends

B. taking photography classes

C. getting lost while looking for classes

D. ignoring your homework until your teacher reminds you

4. The article is probably taken from _____. [ ]

A. a travel magazine

B. a book review

C. an advice column for students

D. a film poster

市场的三大构成要素同时决定着市场的（）。

( )被称为“西方福利国家的蓝图”。

A．“伦敦新约”

B．“贝弗里奇报告”

C．“杜鲁门报告”

D．“罗斯福新政”