杭钢供应半山生活区民用煤气，要求焦化煤气经干法脱硫塔后煤气含硫化氢量不大于（）mg/Nm3。
A.20
B.50
C.100
D.150
参考答案：A
Father won’t agree to fly to Paris for the holiday ----it is ________ expensive.
A．far too
B．too much
C．very much
D．too far
TDI的中文全称是（）。
