传热的基本方式是()。
A、传导,折射,对流
B、传导,反射,对流
C、传导,辐射,吸收
D、传导,辐射,对流
参考答案:D
After having some interesting rides and terrifying free-fall drops, the children returned home,
_________ but excited.
A.inspired
B.satisfied
C.worn-out
D.depressed
停经3个月,子宫大于孕周,鉴别正常妊娠、多胎、异常妊娠的最好方法是()
A.超声多普勒检查
B.腹部X线片
C.B超检查
D.胎儿心电图检查
E.羊水中甲胎蛋白测定