高空施焊时必须使用标准的防火(),戴头罩。
A、焊具
B、安全带
C、工作服
D、工具
参考答案:B
我国营业税实行行业差别比例税率,娱乐业的税率最高为( )。
A.13%
B.17%
C.20%
D.33%
People read newspapers and magazines in order to keep themselves _________ of
what is going on in the world outside.
A.connected
B.known
C.updated
D.informed