在易燃易爆场所擦洗设备、衣物、工具及地面不得使用（）。
A.清水
B.专用洗涤剂
C.汽油
D.煤油
参考答案：C, D
After the new technique was introduced，the factory produced ____ in 2001 as the year before．
A．as twice many machines
B．twice many as machines
C．as many machines twice
D．twice as many machines
混凝土现浇作业时，发现有（）等情况，应立即整改。
A.模板松动
B.变形
C.走移
D.钢筋埋件移位
E.有垃圾
