调压阀内的节流针阀的作用是()
(A)截断和导通流体;
(B)调节流量;
(C)控制气流压力;
(D)控制作用与调节阀膜头上的压差
参考答案：D
根据句意和首字母提示写单词。
1. Sally often goes to McDonald, because she likes h_________ very much.
2. Julia's mother cooks d___________ for her every evening.
3. His sister eats lots of h___________ food.
4. I don't like milk for b___________.
5. I don't like b__________, but I like pears.
根据我国《城市房屋拆迁管理条例》规定，拆迁人应当自拆迁委托合同订立之日起 ( )日内，报房屋拆迁管理部门备案。
A．45
B．30
C．15
D．7
