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【单选题】
如图所示示教器的界面 2 号的功能是 ___________ 。A.
拔下示教器的按钮
B.
运行模式切换的钥匙开关
C.
紧急停止键
手机使用
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反馈参考答案：
举一反三
【单选题】It is no use ______.
A.
to buy books and not to read them
B.
buying books and not to read them
C.
buying books and not reading them
D.
to buy books and not reading them
【单选题】听力原文：Which of these books haven't you read? (A) I haven't read the ones in French. (B) I only read in the evening. (C) Here are the books you must read. (19)
A.
B.
【简答题】能识别LDL受体的载脂蛋白是
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