It is the first time that I _____ abroad.
A. have been B. was B. will have been D. am
答案:A
把正在熔化的冰拿到0℃的房间里,下列说法中正确的是( )
A.冰继续熔化,在熔化过程中温度保持不变
B.冰不再熔化,因为冰不能从周围吸热
C.因为冰熔化时,温度高于0℃,所以冰不再继续熔化
D.因为冰熔化时,温度低于0℃,所以冰将继续熔化
治疗肛门失禁采用()
A.脂肪移植
B.筋膜移植
C.肌肉移植
D.软骨移植
E.大网膜移植