问题
单项选择题
甲状腺合成甲状腺素需要（）
A.钙
B.钾
C.碘
D.镁
E.铁
答案
参考答案：C
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甲状腺合成甲状腺素需要（）
A.钙
B.钾
C.碘
D.镁
E.铁
参考答案：C
| 从方框中选择正确的句子补全对话。 | |
| A：I would like to go shopping. 1 B：I'd love to. I want to buy a coat for myself.(In a shop) C： 2 A：size five. and I'd like black shoes. C：I'm afraid we don't have any black shoes here now. They are sold out(卖完). B：(Turns to the saleslady.) Do you have any coats here? C：Yes. 3 B： 4 C：Eighty yuan. B：That's a little expensive. Can I try it on? C：Certainly. A：Oh. It looks nice on you! B：OK. I'll take it. C： 5 | |
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