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【判断题】
一个生态系统内只有一个。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】Phil, thanks a million for ___________.
【单选题】-Thanks a million for your help. -_ .
A.
Never mind
B.
My pleasure
C.
Good idea
D.
That's Ok
【简答题】This
is Cara and Ben. They are twins( 双胞胎 ). They are twelve. This is their
bedroom. It’s a nice room. There are two beds in the room. The yellow bed is
Cara’s and that green one is Ben’s. The twins h...
【单选题】Thanks in part to technology and its constant sounding and ringing, roughly 41 million people in the United States—nearly a third of all working adults—get six hours or fewer of sleep a night, accordi...
A.
Originally
B.
Typically
C.
Strangely
D.
Precisely
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