问题
单项选择题 B型题
细胞的生物电现象中，“人们常把静息电位存在时膜两侧所保持的内负外正状态”称为（）
A.复极化
B.膜的极化
C.静息电位
D.膜的超级化
E.去极化或除极
答案
参考答案：B
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细胞的生物电现象中，“人们常把静息电位存在时膜两侧所保持的内负外正状态”称为（）
A.复极化
B.膜的极化
C.静息电位
D.膜的超级化
E.去极化或除极
参考答案：B
| 阅读理解。 | ||||||
| ||||||
| 1. From the above, we know that this is ______. | ||||||
| A. a notice B. an advertisement C. a postcard | ||||||
| 2. If you take a tour to Hainan on June 23rd, you will return on______. | ||||||
| A. June 26th B. June 25th C. July 26th | ||||||
| 3. You can visit ______ main places if you take the tour. | ||||||
| A. 4 B. 5 C. 6 | ||||||
| 4. The price for the tour doesn't include ______. | ||||||
| A. bus service B. meals C. plane tickets | ||||||
| 5. Which of the following is TRUE? | ||||||
| A. You don't have to pay $ 650 if you book the tour earlier. B. You have to go to the office to book the tour. C. You can book the tour at 5 p.m. on Monday afternoon. | ||||||