成人平均每分钟的脑血流量是()
A.1000~1200ml
B.750~1000ml
C.700~1200ml
D.1000~1500ml
E.800~1000ml
参考答案:B
They see you as something of a worrier,__________ problems which don’t exist and crossing bridges long before you come to them.
A.settling
B.discovering
C.seeing
D.designing
开车前,先用手半动齿轮空转10min,检查各部分零件是否转动灵活,特别注意制动闸是否好用。