问题
单项选择题
轿壁的机械强度试验是在5C.m的面积上，施加（）N均匀分布力，其弹性变形不大于15mm
A.1000
B.400
C.300
D.200
答案
参考答案：C
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轿壁的机械强度试验是在5C.m的面积上，施加（）N均匀分布力，其弹性变形不大于15mm
A.1000
B.400
C.300
D.200
参考答案：C
| 选词填空。 | |
____________ in Australia. Koala likes ____________ very much. They always sleep in the ____________. They can sleep 20 hours a day. Kangaroos like ____________, and they can jump very ____________. Sometimes you can see ____________ kangaroos stay in their mother's pouch (育儿袋) for months. I like these two kinds of animals very ____________. Which animal do you ____________? |