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问题 选择题

近似数0.03020有效数字的个数和精确度分别为 [ ]

A.四个，精确到十万分位

B.三个，精确到十万分位

C.三个，精确到万分位

D.四个，精确到万分位

答案

答案：A

改错题

文中共有10处错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏词符号（∧），并在此符号下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：    1、每处错误及其修改均仅限一词；

2、只允许修改10处，多者（从第11处起）不计分。

I have many friends, and I have only one good friend. Her name is Zhou Fang. Fang is my closed friend in our school. After class, we always take walk in the garden and talk about a lot of thing. We talk to the topics in the newspaper, some difficulty math problems and so on. Fang can even be my teacher because of she often offers me good advice. We are very happy when they get together. Friendship helps me grow and enjoying my life. We all need friends because friendship are wealth!
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判断题

数控车床传动系统的进给运动有纵向进给运动和横向进给运动。
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