二尖瓣狭窄时如心尖区可闻及第一心音亢进和开瓣音时提示()
A.瓣叶钙化
B.瓣叶硬化
C. * * 肌功能不全
D.前瓣叶柔顺、活动好
E.二尖瓣脱垂
参考答案:D
This is a picture of the twin sisters' room. It is a nice room. Lily's books are on the desk. Her backpack is on the floor. Liz's pencils are on the books. Her backpack is behind her chair. Their coats are behind the door. We can't see Lily and Liz in the picture. They're not at home.
判断下列句子是否符合短文内容,符合的用“T”表示,不符合的用“F”表示。
小题1:This is a picture of Lily and Liz's room.
小题2:Lily's backpack is behind the chair.
小题3:Liz's and Lily's coats are on the chair.
小题4:Lily and Liz are not at home.
小题5:Their room is nice.
下列气温曲线、降水柱状图能反映北京气候特点的是( )
A.A
B.B
C.C
D.D