问题
单项选择题
柴油机运转中应（），以防止燃烧室零件产生疲劳破坏。
A．加强冷却
B．加强润滑
C．停车后不可停冷却水
D．停车立即停止润滑
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
柴油机运转中应（），以防止燃烧室零件产生疲劳破坏。
A．加强冷却
B．加强润滑
C．停车后不可停冷却水
D．停车立即停止润滑
参考答案：C
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| I knew little about English when I first came to America. So I went to a language school every day to 1 English. One day, during the break, I asked one of my classmates a question. When I thanked her for it, she said," 2 . It's a piece of cake." I thought to 3 , "She wants a piece of cake?" So I said to her, "I haven't taken any piece of 4 with me today. What about a piece of biscuit (饼干)?" She looked at me in surprise and then smiled. She knew that I didn't 5 her. She said, "What I mean is 'no problem,'" Then I began to learn that "a piece of cake" is not only a piece of cake, but also means a thing that is very easy. | ||||
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