问题
单项选择题
清管收发装置是收发清管器的主要设备,它的结构由排污管、平衡管入口、放空管和()组成.
A.快开盲板、排污管
B.筒体、快开盲板
C.排污管、筒体
D.快开盲板、筒体、进气口
答案
参考答案：D
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清管收发装置是收发清管器的主要设备,它的结构由排污管、平衡管入口、放空管和()组成.
A.快开盲板、排污管
B.筒体、快开盲板
C.排污管、筒体
D.快开盲板、筒体、进气口
参考答案：D
| 阅读理解。 | ||||
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| 根据寻物启事或失物招领启事，选出正确答案。 1. Who lost a bike? A. Betty. B. Jimmy. C. Bruce. D. David. 2. Is the ring Betty's? A. Yes, it is. B. No, it isn't. C. Yes, this is. D. No. It is David's. 3. What color is Jimmy's new bike? A. Green. B. White. C. Black. D. Red. 4. Who can you call for the backpack? A. Betty. B. Jimmy. C. Bruce. D. David. 5. What is Bruce's phone number? A. 678-42190. B.892-02311. C. 708-52097. D.291-20845. |