在外界负荷不变的情况下，汽压的稳定要取决与（）
参考答案：炉内燃烧工况稳定
---- What about my idea?
---- Very good! But not many people ________ the idea that money brings happiness.
A．subscribe to
B．take to
C．contribute to
D．relate to
下列哪项不是导致早产的可能原因
A．双角子宫
B．胎膜早破
C．羊水过少
D．多胎妊娠
E．下生殖道感染
