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问题 选择题

用质量浓度为0.3g/mL的蔗糖溶液浸泡下列细胞，可能发生质壁分离的是[ ]

A．人的口腔上皮细胞

B．洋葱根尖的分生区细胞

C．煮熟的马铃薯细胞

D．洋葱鳞片叶表皮细胞

答案

答案：D

解答题
求直线y=x+1与双曲线y=
2
x
的交点坐标．
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听力题

根据短文内容和所给中文提示，在空白处写出单词的正确形式，每空限填空一词。

John Allen, an American scientist once said, “ the Internet is the world’s largest library, but all the  小题1: (书 ) in it are on the floor!” What he meant is that the Internet is full of 小题2:   (信息) . But it can be difficult to find what you really need . The Internet has  _小题3:_ (另一个) disadvantage anyone can  _小题4:_ （创建）a website,so you can find websites about what ever you can imagine. Unfortunately, a lot of what is written on them is not always true.

At the same time, the Internet provides many other things .On some websites, you can download music and films . They are usually very _小题5:_ (便宜) and some are even free. On some other websites, you can connect with people from all over the world . And there are some great online  _小题6:（商店），too. For example，one Bay people  _小题7:_ (卖）,used clothes, CDs, and even cars at very low prices .

It is true that the Internet has changed the way we work and _小题8:_ (交流). But we should not depend on it too much . Some people are also afraid that 小题9:     (网上冲浪）the Internet has taken the place of other healthier activities, especially for _小题10:_ (年轻的) people . Whether you love it or hate it, though, you’d better get used to it because it is right here to stay .
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