在给水管的调节阀前、可分式省煤器出口和()出口与主汽阀之间都应装压力表。
参考答案:过热器
Though these dresses are low in quality, they may ____to women who don’t want to spend much on clothes.
A.refer
B.adjust
C.apply
D.appeal
圆(x-1)2+(y-2)2=4和直线(1+2λ)x+(1-λ)y-3-3λ=0相交于两点. (1)
(2)