问题
单项选择题
（）决定了泵的安装高度.
A.扬程
B.功率
C.效率
D.允许吸入高度
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
（）决定了泵的安装高度.
A.扬程
B.功率
C.效率
D.允许吸入高度
参考答案：D
| 用所给单词的适当形式填空。 | |
2. I don't think it's ________ for visitors to just do some shopping. 3. It's not ________ for you to spend so much time watching TV. 4. How many ________ are there in an hour? 5. Miss Yang is a new teacher. She teaches _______ English. |