交直流电源线及信号线应分开布放,避免在同一线束内。无法避开同一路由时,至少要间隔()以上
A.5CM
B.3CM
C.10CM
D.15CM
参考答案:A
健康成人一次失血量不超过多少毫升可通过人体的代偿使之逐渐恢复而不用输血()
A.600ml
B.1000ml
C.1500ml
D.2000ml
E.2500ml
I can't tell whether the book is worth reading, _____ I haven't read it myself.[ ]
A. but
B. so
C. or
D. for