The book provides tips for Westerners who work in Japanese firms: get together outside the office, find a mentor for support and refrain for practicing Japanese with colleagues on the job.

A．of

B．fro

C．off

D．from

下列物质中，与水作用会发生化学自热着火的是（）。

A．金属钠

B．甘油

C．有机过氧化物

D．黄磷