变电所的电流回路仪表，其精确度等级不应低于（）级。
A.1.0
B.1.5
C.2.0
D.2.5
参考答案：B
患牙的诊断最可能是
A．深龋
B．可复性牙髓炎
C．急性牙髓炎
D．慢性牙髓炎
E．牙髓坏死
_____ eveyone in his class _____ watching TV? [ ]
A. Is, like
B. Do, like
C. Does, like
D. Are, like
