CRH1A型动车组受电弓气囊驱动装置内的减压阀的调节精度为士（）kPa。
A.2
B.5
C.8
D.10
参考答案：A
Asia is the largest continent, ___ one third of the earth’s land area.
A．to cover
B．cover
C．covering
D．covered
绘画赏析：《向日葵》
