肺结核大咯血时首选止血剂是( )
A.安络血B.垂体后叶素C.止血敏D.氨甲苯酸E.氨基己酸
参考答案:B
铸造前调整平衡配重主要目的是 ()
A.使坩埚口正对铸道口
B.使铸圈低于坩埚
C.以上都不是
D.使两边重量平衡
E.使铸圈高于坩埚
In the past 12 months, Taylor Swift ____ her CD Fearless become the year’s bestselling album.
A.saw
B.was seen
C.has been seen
D.has seen