治疗血吸虫病的首选药是
A．大观霉素B．呋喃丙胺C．吡喹酮D．氯硝柳胺E．阿苯哒唑
参考答案：C
一个数的5倍是450，这个数是[ ]
A．80
B．90
C．2250
D．445
—Do you like the two skirts?
―The yellow one is good but the green one looks _______. [ ]
A. nicer
B. nice
C. best
