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【简答题】
直线定向是确定（ ）方向和标准线方向之间的角度关系。
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【简答题】“This is a good part here,” I said. “Where it says Your friendship over the years has meant an __1__ lot to me, more than I can say because I’m not good at saying things like that.” I found myself n...
【简答题】根据短文内容和所给中文提示,写出空白处各单词的正确形式 “Sorry” is a word that people in the US often say in their daily life. One day while I 1___________(行走)on the street, a young man ran by hurriedly, brushing*against my 2___...
【单选题】光的传播速度很快,它在水中的传播速度是()。
A.
2.25×10^11m/s
B.
2.25×10^10m/s
C.
2.25×10^9m/s
D.
2.25×10^8m/s
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