CRH1轮对内侧距离为()。
A.1350mm
B.1351mm
C.1352mm
D.1353mm
参考答案:D
I am pleased ______to the party ------it was so fantastic!
A.to invite
B.to have been invited
C.to be invited
D.to have invited
煮沸法杀灭带芽胞的细菌,所需要的时间至少为:()
A.20分钟
B.30分钟
C.40分钟
D.50分钟
E.60分钟