猪囊尾蚴主要寄生在()
A.肺脏
B.皮肤
C.小肠
D.咬肌
E.肝脏
参考答案:D
It’s bad ____ for a man to smoke in the public places where smoking is not allowed.
A.behavior
B.action
C.manner
D.movement
铝及铝合金管的焊接可采用( )。
A.手工钨极氩弧焊
B.氧—乙炔焊
C.熔化极半自动氩弧焊
D.真空焊