问题
单项选择题
支持细胞
A．人绒毛膜促性腺激素
B．人胎盘生乳素
C．雌激素
D．孕激素
E．前列腺素
答案
参考答案：C
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支持细胞
A．人绒毛膜促性腺激素
B．人胎盘生乳素
C．雌激素
D．孕激素
E．前列腺素
参考答案：C
| 根据对话内容及方框中所给的句子补全对话。选项中有一项是多余选项。 | |
| A: Hello, Mr. Smith! B: Hello, Yang Jun! 1.________ You look worried and upset. A: 2.________ I really need your help. B: What do you mean? A: Well, 3.________ But it becomes more and more difficult since I am in Grade Three. My parents don't allow me to play basketball. B: Maybe your parents are right. 4.________ A: I see. I do well in all my lessons and I think I should be allowed to do the things that I'm interested in. B: OK. 5.________ A: Thank you, Mr. Smith. It's very kind of you.
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