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问题
单项选择题
重载下降操作,不能将手柄放在下降方向()档,
A、第一
B、第二
C、最慢
答案
参考答案:A
改错题
单句改错。
1. You should take money to you.
2. What is the weather there?
3. He plans spending time with his friends.
4. The boy can't wait watch TV.
5. I have nice something to tell you.
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判断题
测定水的硬度时,用HAc-NaAc缓冲溶液来控制pH值
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