黑热病病原治疗首选药物是（）
A.戊烷眯
B.锑剂
C.羟眯替
D.奎宁
E.甲硝唑
参考答案：B
In the activity, a few hours of “disability” gave us only a taste of the _______ both physically and mentally the disabled people should overcome.
A．weakness
B．challenges
C．anxieties
D．illness
用万能角度尺测量工件时，当测量角度大于90°小于180°时，应加上（）
A.90°
B.180°
C.360°
