为防止加热器水侧超压,应在水侧给水进口阀和出口阀之间设置一个安全阀或超压报警装置,安全阀接管最小直径为()。
A.5mm
B.10mm
C.15mm
D.20mm
参考答案:D
排列句子。
( ) No, it's my mother's.
( ) Oh, it's beautiful.
( ) Nancy, is this your skirt?
( ) It's on the chair.
( ) Where's your skirt?
逻辑电路