治疗氰化氢中毒的药物是
A．葡萄糖醛酸B．依地酸二钠钙C．硫代硫酸钠D．二甲基硅油E．阿托品
参考答案：C
作业环境气体检测主要包括（）
A.可燃气体的检测
B.有毒气体的检测
C.蒸汽的检测
D.氧气含量的检测
E.氮气含量的检测
These shoes look very good；I wonder ________.[ ]
A. how much cost they are
B. how much do they cost
C. how much they cost
D. how much are they cost
