问题
单项选择题
造成变速器换档困难的主要原因是（）。
A.变速器操纵杆自锁弹簧折断
B.变速器齿轮磨损严重
C.离合器踏板自由行程过小
D.离全器分离不彻底
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
造成变速器换档困难的主要原因是（）。
A.变速器操纵杆自锁弹簧折断
B.变速器齿轮磨损严重
C.离合器踏板自由行程过小
D.离全器分离不彻底
参考答案：D
Food is very important. Everyone needs to well if he or she wants to be healthy. Our minds (头脑) a kind of food, too. This kind of food is knowledge (知识). We began to get when we were very young. Small children very interested in everything around them. They learn everything while they are watching listening. When they are getting older, they began to read books, science books, and anything they like. When they find something new, they love to ask questions and to find the answers. What is the best to get knowledge? If we learn by , we’ll get the most knowledge. If we’re getting answers from others and do not ask why, we’ll never learn well.
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