离心泵按吸入方式分单级离心泵和多级离心泵两种。
题型：判断题
问题：
离心泵按吸入方式分单级离心泵和多级离心泵两种。
题型：判断题
| 根据所给信息, 完成对话, 每空一词. | ||
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| A: Look! This is my good friend. B: __1 _? A: His name is Wilson. B: __2 _? A: He's 30 years old. B: __3 _? A: He is from England. B: What does he like? A: __4__. B: What does he look like? A: __5__． |
