并列运行时，如果其中一台变压器发生故障从电网中切除时，其余变压器（）。
A、必须停止运行
B、仍能继续供电
C、肯定也发生故障
D、自动切除
参考答案：B
— Look! The window is broken. Someone broke it _____ purpose.
— That may be right. But perhaps it was broken _____ accident. [ ]
A. on; by
B. by; by
C. on; on
D. by; on
传播克里米亚-刚果出血热的硬蜱是（）
A.嗜群血蜱
B.边缘革蜱
C.亚东璃眼蜱
D.全沟硬蜱
E.乳突钝缘蜱
