原式=4-5÷（-18）+14
=4+40+14
=58
How many_______do you want?
A．glass of apple juice
B．glass of apples juice
C．glasses of apple juice
D．glasses of apples juice
二氧化碳灭火系统中选择阀上一定要有标明防护区的铭牌。（）
