注射用水应于制备后()
A.4小时内使用
B.8小时内使用
C.12小时内使用
D.16小时内使用
E.18小时内使用
参考答案:C
There are differences in spelling and pronunciation_______ AmE and BrE. That means AmE is more or less different _________BrE.
A.between; from
B.from; in
C.in; between
D.from ; between
积冰对飞行的影响程度,除了与积冰类型有关外,主要取决于()。