问题
选择题
In the ____ way, I don't think a boy of ten can take care of your pet dog ____. [ ]
A. ordinary; properly
B. usual; actually
C. correct; exactly
D. common; usually
答案
答案：A
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In the ____ way, I don't think a boy of ten can take care of your pet dog ____. [ ]
A. ordinary; properly
B. usual; actually
C. correct; exactly
D. common; usually
答案：A
，两次经过一个较高的点B的时间间隔是
，则A、B之间的距离为( )
B.
D.