问题
选择题
The summer is coming, _____ your sweater and _____ your T-shirt.[ ]
A. put on, take off
B. take off, put on
C. puts on, takes off
D. putting on, taking off
答案
答案：B
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The summer is coming, _____ your sweater and _____ your T-shirt.[ ]
A. put on, take off
B. take off, put on
C. puts on, takes off
D. putting on, taking off
答案：B
倍，则太阳与地球的质量之比为：（ ）
