题目内容

What does speaker think 13-year-old Faye look?

A. average, healthy-looking
B. pretty
C. ugly

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What is the synonym of the compound word “always-on environment”?

A. off line
B. online
C. on-and-off

How many teenagers are withdrawing from classroom debate because they don’t want to draw attention to the way that they look?

A. nearly one in three teenagers
B. one in five teenagers
C. nearly 35 percent

并联的目的是为了提高水泵的，串联的目的是为了增加水泵的。

两台同型号水泵在外界条件相同的情况下并联工作，并联后在并联工况点的扬程比一台泵工作时扬程（）

A.成倍增加
B.增加幅度不明显
C.大幅度增加、但不是成倍增加
D.不增加