选择题:一Haven’t seen you for ages!What are you busy doing

题目内容:
一Haven’t seen you for ages!What are you busy doing now?

A.1 hate the weather here.
B.My hair is getting a bit longer.
C.Yeah,thanks for coming.
D.I am working part time in a bookshop,you know.
参考答案:

通过节流阀的流量与节流阀的通流截面积成正比,与阀两端的压力差大小无关。

通过节流阀的流量与节流阀的通流截面积成正比,与阀两端的压力差大小无关。

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