问题
判断题
柱塞运动时，当柱塞腔的容积由小变大，就产生真空，进行吸液，当柱塞腔的容积由大变小，就把吸进来的油液排出去。（）
答案
参考答案：对
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柱塞运动时，当柱塞腔的容积由小变大，就产生真空，进行吸液，当柱塞腔的容积由大变小，就把吸进来的油液排出去。（）
参考答案：对
My name is Ann. I am 16 years old. I never try to lose weight (减肥) but I am slim and beautiful. ? Because I keep a diet. breakfast, I always have some bread and an egg and I drink a glass of milk. It helps me start the day. I usually have breakfast at half past seven. We have four lessons in the morning. At ten o’clock when I am not studying, I sometimes eat one or two pieces of sugar because I need lots of . Lunch usually begins at half past twelve. I often eat beef, rice and vegetables for lunch. My mum says that lunch is very important so I miss (错过) lunch at school. One hour after lunch, I eat some 42 . I usually eat one apple or two bananas. I like bananas best. I drink three or four glasses of in the afternoon because there is no calories in the water. For dinner, I often have soup and vegetables. Tomatoes are my favourite. I usually have supper at half past seven. After dinner, I don’t eat or drink I go to bed. I never play basketball or volleyball. But I a lot. I almost go everywhere on foot. That’s why I am so slim.
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