What does he want to do

A．He wants to make a business trip.

B．He would like to borrow the book next week.

C．He would like to have the book by next week.

D．He wants to take a business trip next week.

当设有自动联动装置或自动灭火系统时，应采用( )。

A．可燃气体探测器

B．火焰探测器

C．光电感烟探测器

D．感烟、感温、火焰探测器的组合