节流阀在正常作业工况时处在()位。
A、开
B、关位
C、半开
D、任意
参考答案:C
--You didn't know __ Miss Burton, do you?---Is it the blonde girl who is always dreaming to be actress.
A.a, the
B./. the
C.a, an
D./ ,a
原发性肝癌最常见的症状是乏力、消瘦、食欲缺乏。