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【单选题】
下列（）措施不能有效防止柴油机高温腐蚀。A.
排气阀采用高镍钼合金钢
B.
采用组合式活塞
C.
采用摇臂式机械动作的启阀机构
D.
防止排烟温度过高
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举一反三
【简答题】As Sam slowly woke, he got a funny feeling in his stomach. He knew he would have to do something that he had been afraid to do for a long time. The school bus came on time and he sat with his friend B...
【单选题】— I came to your office yesterday morning, but nobody was in. — Oh, we _____a meeting in the meeting room. [ ]
A.
have had
B.
had
C.
were having
D.
are having
【简答题】词汇运用。根据句意及首字母或汉语意思补全单词。 1. It's a long way.He can h_______ walk now. 2. Movie Palace has the most c_______ seats in the city. 3. The book is w_______ than that one.I don't like to read it. 4. —Would y...
【单选题】--- Believe it or not, I ______ an old friend of mine while abroad. --- Oh, it’s a small world.
A.
came up
B.
came out
C.
came across
D.
came about
【单选题】某物业大厦,生活水泵配电控制运行正常,但在自动给水系统中不能启动,有可能是监控系统中下列哪个设备出问题
A.
低水位启泵传感器
B.
高水位停泵传感器
C.
溢流水位传感器
D.
超低水位传感器
【简答题】In many African countries, the care of orphans has been mainly led by foreign donor organizations. However, Sister Florence has changed all that. Using her own resources, Sister Florence is leading th...
【单选题】- I came to your home yesterday afternoon, but nobody was in. - Oh, we ________ some shopping in the supernarket. [ ]
A.
have done
B.
did
C.
were doing
D.
are doing
【单选题】某物业大厦，生活水泵配电控制运行正常，但在自动给水系统中不能启动，有可能是监控系统中下列哪个设备出问题()。
A.
低水位启泵传感器
B.
高水位停泵传感器
C.
溢流水位传感器#3超低水位传感器
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