下列选项中不是病毒保护剂的是()
A.甘油
B.甲醛
C.蔗糖
D.谷氨酸钠
参考答案:B
——Why are you late for the meeting?
—— I got caught in the heavy rain, or I _______ earlier.
A.arrived
B.had arrived
C.would arrive
D.would have arrived
()是建军治军之本,也是战争制胜的关键因素。
A.科技
B.人才
C.武器
D.纪律