职业道德具有自愿性的特点。
参考答案:错
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