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【判断题】
在用同相正交环法提取载波的方法中存在相位模糊问题。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】How many hours is the store open every day during its sale days? ______ hours.
【单选题】—Could you please show me how to get to the furniture store? — Sure, _____ the escalator to the second floor, _____ left and you'll see it. [ ]
A.
sit, take
B.
catch, turn
C.
take, turn
【单选题】How‘s the convenience store sector doing in Japan? 查看材料
A.
The article doesn't say.
B.
It's doing great.
C.
Not very well.
D.
Cannot see clearly.
【单选题】— How _____________ is it to the store? — About 1 kilometre. [ ]
A.
old
B.
far
C.
tall
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