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【判断题】
植物细胞存在着系统和受体激酶，负责跨膜的信号转换和传递。()A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】信号是信息的载体,在电路中所用的电信号划分为 __________________ 和模拟信号。
【单选题】听力原文：W: How's your morning exercise coming along? M: Perfect. I do morning exercise every day now except when it rains. How're things with you? W: Very well. Can you see I've lost several pounds? What...
A.
Both the man and woman like sports.
B.
The woman does morning exercise every day except when it rains.
C.
The man wants to lose weight.
D.
Both the man and the woman want to keep fit.
【简答题】金义成是___流派的代表人为
【单选题】---________do you exercise? -I exercise once a day. [ ]
A.
How often
B.
How long
C.
How old
D.
How much
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