问题
单项选择题
在大型船用柴油机备车过程中对滑油系统预热的常用方法是（）。
A．启动滑油分油机进行分油预热
B．在滑油循环柜中蒸汽预热
C．在滑油循环柜中电加热器预热
D．开启滑油泵在管系中蒸汽预热
答案
参考答案：A
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在大型船用柴油机备车过程中对滑油系统预热的常用方法是（）。
A．启动滑油分油机进行分油预热
B．在滑油循环柜中蒸汽预热
C．在滑油循环柜中电加热器预热
D．开启滑油泵在管系中蒸汽预热
参考答案：A
| 根据对话内容，选择恰当的句子补全下列对话。 | |
| (H for Henry; J for Janet) H: Hi, Janet, Would you like to help save the environment? J: I don't know. 1______ H: Well, first, you can start by turning off the lights. J: Yes. That's easy. Sometimes I turn on the lights without thinking. 2______ H: Second, you can ride a bicycle. 3______ J: That will save money, too. What else? H: Third, try to recycle paper. J: Mm. We get a lot of paper at home. Good idea. H: The fourth idea is turning off the shower when you're not using it. J: You mean, when I have shampoo (洗发剂) in my hair? H: Yes. 4______. Every minute helps. And fifth, take a bag when you go shopping. Don't use plastic bags (塑料袋). J: OK. 5______. I'll tell them.
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