PS820板故障将导致()故障。
A.轻微
B.严重
C.紧急
D.任何
参考答案:B
Come home _____ you can, please. [ ]
A. as soon as
B. as fast as
C. as quickly as
D. as sooner as
下列仪器不能加热的是()。
A.锥形瓶
B.容量瓶
C.坩埚
D.试管