直通式升降止回阀应安装在()管道上。
A、垂直
B、水平
C、低斜
参考答案:B
-----How do you like the party?
----wonderful. If you had come with us , you ______a good time.
A.had
B.had had
C.would have
D.would have had
属存款证明手续费收取标准规定的是()
A、单位存款证明每份收费50元;
B、单位存款证明每份收费100元;
C、个人存款证明每份收费10元;
D、撤销存款证明,已收取的手续费一律退还。