汽轮机运行中,汽缸通过保温层,转子通过中心孔都有一定的散热损失,所以汽轮机各级的金属温度略低于蒸汽温度。
参考答案:对
In addition to his traditional medical treatment, he tried to put himself in situations______ would bring about positive emotions.
A.which
B.where
C.why
D.as
患者,女性,已婚未育,主因停经2个月余, * * 不规则出血6天,自测尿妊娠试验阳性,血HCG高于正常,B超示增大的子宫区充满长形雪花状光片,双侧卵巢有黄素化囊肿。
最可能诊断为()。
A.异位妊娠
B.先兆流产
C.葡萄胎
D.不全流产
E.前置胎盘