The old man died ____ cold ____ a cold night.
A.from; at
B.of;in
C.of;on
D.for; during
答案:C
生物的多样性包括[ ]
A.物种多样性
B.遗传多样性
C.生态系统多样性
D.以上都对
免费车辆有哪些种类?()
A、有卡免费
B、无卡免费
C、特殊车辆免费
D、公务车辆免费