防御铁屑、灰砂、碎石等物冲击伤害眼面的眼面防护用品是:()。
A.焊接面罩
B.防冲击眼(面)护具
C.防化学药剂眼(面)护具
参考答案:C
.The cars _______ in Beijing are as good as those _______ in Shanghai.
A.produce, produce
B.produced, produced
C.produced, producing
D.producing, producing
投资估算的具体内容不包括( )。
A.设备及工器具购置费
B.安装工程费
C.设备方案费
D.涨价预备费