问题
单项选择题 A1/A2型题
用于电镜研究的组织块乙醇梯度脱水正确的是（）。
A.40％、50％、70％、90％和100％
B.60％、70％、80％、90％和100％
C.50％、70％、80％、90％和100％
D.40％、60％、80％、90％和100％
E.50％、60％、80％、90％和100％
答案
参考答案：C
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用于电镜研究的组织块乙醇梯度脱水正确的是（）。
A.40％、50％、70％、90％和100％
B.60％、70％、80％、90％和100％
C.50％、70％、80％、90％和100％
D.40％、60％、80％、90％和100％
E.50％、60％、80％、90％和100％
参考答案：C
| 读短文，填写表格。 |
| Last week, Anna was in Beijing for six days. On the first day, July third, she went to the Great wall. On the second she went shopping. Then she went to the library and the zoo on the third day. On the fourth she went swimming. Then the next day she didn't go anywhere. On the last she went back to Fuzhou. |
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