显示产肽激素细胞的亲银反应在浸银后不用()
A.媒染剂
B.促染剂
C.还原剂
D.氧化剂
E.漂白剂
参考答案:C
It ______ that he has been ill for a long time.
A.seem
B.seems
C.look
D.looks
气的上升运动太过,称为()。
A.气滞
B.气逆
C.气不降
D.气脱
E.气郁