小剂量亚甲蓝治疗（）
A.有机磷中毒
B.铅中毒
C.氰化物中毒
D.亚硝酸盐中毒
E.急性酒精中毒
参考答案：D
Fully________to looking after three children at home，she no longer has time to enjoy the various activities in the club.
A．attached
B．occupied
C．contributed
D．devoted
STC12C5A60S2是（）。
A、CPU
B、微处理器
C、单片微机
