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问题 单项选择题

以反复发作的突发性骨骼肌弛缓性瘫痪为特征的疾病为（）

A.进行性肌营养不良症

B.多发性肌炎

C.低钾型周期性瘫痪

D.少年近端型脊髓性肌萎缩症

E.先天性肌强直

答案

参考答案：C

单项选择题

下列关于植物生长素作用及其应用的叙述中，不正确的是（）

A.成熟细胞比幼嫩细胞对生长素更为敏感

B.顶端优势能够说明生长素作用的两重性

C.适宜茎生长的一定浓度的生长素往往抑制根的生长

D.可利用生长素类似物防止落花落果
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完形填空

A: Hello!

B: Hello, Tom. 小题1:___________________________?

A: I’m OK. And you?

B: I’m great. I just returned from a school trip.

A: That sounds fun. 小题2:___________________________

B: I went to the aquarium.

A: Wow. 小题3:________________________

B: No, there weren’t any whales, but there were some sharks.

A: Cool! What else did you see?

B: I saw some crocodiles. 小题4:___________________________. I don’t like them. I also saw some funny penguins.

A 小题5:_______________________

B: After that, we got on the bus and went to the park. We had our lunch there. Then we got back to school.

A: That is a great school trip.

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