疫苗接种前要详细询问()
A.过敏史
B.家族史
C.病史
D.遗传史
E.个人嗜好
参考答案:A, C
用一根长50cm的铁丝围成半径为15cm的扇形,那么这个扇形的面积是______平方厘米.
After having a cup of tea, he asked for _____.
A.two more
B.more two
C.more than two
D.two cups