Look! My glasses ___________ on the table. [ ]
A. is
B. am
C. are
答案:C
有100张已编号的卡片(从1号到100号),从中任取一张号码是5的倍数的概率是[ ]
A.50%
B.20%
C.10%
D.5%
当温度为-40℃时,二氧化碳变为雪花状固体。