淫羊藿、巴戟天共同的功效是()
A.补肾益精,养血益气
B.补肾壮阳,祛风除湿
C.温肾壮阳,祛寒除湿
D.补肾助阳,润肠通便
E.补肾益肺,止血化痰
参考答案:B
I didn't go to the zoo ______ the hot weather. [ ]
A. because
B. so
C. because of
D. but
普通白炽灯的平均寿命为( )h。
A.1000
B.1500
C.2000~3000
D.2500~5000