问题
多项选择题
超声波探伤的缺点是()。
A、穿透力差
B、不能用来探测厚度大的工作
C、判定缺陷类型和定位准确性差
D、成本高
答案
参考答案:A, B, C, D
超声波探伤的缺点是()。
A、穿透力差
B、不能用来探测厚度大的工作
C、判定缺陷类型和定位准确性差
D、成本高
参考答案:A, B, C, D
We wanted to study how students at our school spend money. In order to study this, we made some questions to ask our classmates. First, we asked our classmates how much money they spent in one month. Then we asked how much money they spent on things like drinks, music, books, movies, computer games, and other things. Our math teacher helped us make a graph of our classmates’ answers. Then we thought it would be interesting to compare these answers with our classmates’ expenses from last year. We used their answers to make another graph for their expenses last year. Looking at the two graphs, it is easy to compare the expenses for the two years. Some of their expenses increased, but others decreased. This was a very interesting project for us. 注:⑴ graph 图表 ⑵ expense消耗,消费
小题1: What did the students spend most of their money on?
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