问题
单项选择题
液压系统图中，工作管路以（）线表示。
A.粗实
B.细实
C.虚
D.点划
答案
参考答案：A
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液压系统图中，工作管路以（）线表示。
A.粗实
B.细实
C.虚
D.点划
参考答案：A
| 根据句意从方框中选用合适的词，并用其适当形式填空。 | |
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| 1. We made an ________ to meet at the school gate at 3 0'clock. 2. If you have any idea where it ________ be, please call me. 3. It's ________. in spring in Beijing. 4. There must be something ________ the homes in our neighborhood. 5. There would be________ people in the symphony hall. |