胰岛素低血糖激发试验禁用于（）。
A.有惊厥史者
B.黏液性水肿者
C.冠心病患者
D.老年患者
E.侏儒症患者
参考答案：A, B, C, D
—How _____ you have been late then in such a small town?
—Lots of turns in the streets, and the buildings look all the same.
A．can
B．could
C．may
D．must
Bags are usually stowed in between the bulk grain（）.
A.to ventilate the hold
B.to separate the cargo
C.to replace shifting boards
D.to facilitate stowage
