— I called you this time yesterday, but there was no answer.
— Oh, I'm sorry. I dinner at my friends' home.
A:have
B:had
C:was having
D:have had
小明去日本旅游回来,对日本之旅行进行了下列描述,其中与事实不符的是( )
呼气时,膈肌的变化情况( )
在△ABC中,a=b是acosA=bcosB的 ( )