下列不属于生物武器范围的是[ ]
A．寄生虫
B．致病菌
C．被改变的病毒
D．神经毒剂
答案：A
Hearing the director's "________!", all the actors and actresses kept in their own position and waited carefully. [ ]
A. Action
B. Take two
C. Stand by
D. Good take
