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【单选题】
下列哪项不是有效的标识符?A.
user
B.
text_012
C.
0_tood
D.
_abc
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反馈参考答案：
举一反三
【简答题】EPO是()的缩写,它的主要作用是()。
【单选题】We used to see each other _____, but haven’t heard from him since last year.
A.
especially
B.
regularly
C.
particularly
D.
approximately
【单选题】— Long time no see! — Yes, we haven’t seen each other _____ May 4, 2009.
A.
since
B.
in
C.
on
【单选题】We used to see each other ▲ but I haven’t heard from him since last year.
A.
especially
B.
regularly
C.
particularly
D.
finally
【单选题】We used to see each other , but I haven’t head from him since last year.
A.
especially
B.
regularly
C.
particularly
D.
approximately
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