虫卵排出后立即对人具有感染性的寄生虫有()
A.蛲虫
B.细粒棘球绦虫
C.蛔虫
D.猪带绦虫
E.牛带绦虫
参考答案:B, D
I knew that ________ would ever discourage him; he would never give up wanting to be a director.[ ]
A. something
B. anything
C. everything
D. nothing
车辆发生故障时,在什么情况下必须使用硬连接牵引装臵()。
A.发动机损坏时
B.制动失效时
C.喇叭失灵时