在柴油机压缩过程中，气缸内空气( )。

A．压力升高，温度不变

B．压力升高，温度升高

C．压力不变，温度升高

D．压力不变，温度不变

.Most of the students in our class like to read China Daily, which_______ every day.

A．comes out

B．comes up

C．comes across

D．comes about