生产中脱氢氰酸塔灵敏板温度上升时，将有可能导致塔顶冷凝器中（）含量超标。

A、氢氰酸

B、丙烯腈

C、醋酸

D、水分

As the job-hunting season_________，many graduates are suffering from anxiety.

A．kicks off

B．takes off

C．puts off

D．sets off