生物进化论诞生的标志是 [ ]
A、细胞学说的创立
B、《物种起源》的出版
C、《人类的起源》的出版
D、血液循环学说的创立
答案:B
—Excuse me, do you know _____?
—It's over there in front of the park. [ ]
A. where is the post office
B. where the post office is
C. where was the post office
D. where the post office was
S100掘进机控制电路的采用的是()
A、电磁式过流继电器
B、熔断器
C、过热继电器
D、电磁式接触器