再生障碍性贫血（）
A.慢性失血
B.造血干细胞缺陷
C.红细胞酶异常
D.红细胞膜缺陷
E.血红蛋白合成异常
参考答案：B
. Could it be in the restaurant in ____ you had dinner with me yesterday ____ you lost your handbag?
A．that; which
B．which; that
C．where; that
D．that; where
加氢精制装置开工前应作好的准备工作是（）。
A、所有放空线打开
B、所有排污阀打开
C、泵的进出口阀全部关闭
D、调节阀全部打开
