点M(3,2)关于x轴反射的像点坐标是( )
A.(3,2)
B.(3,-2)
C.(-3,2)
D.(-3,-2)
点M(3,2)关于x轴反射的像点坐标是(3,-2).
故选B.
根据句子意思,用括号中所给单词的正确形式填空。
小题1:A friend of (I) is getting married tomorrow.
小题2:Look at the (photo). How beautiful they are!
小题3:I know him probably (well) than anybody else.
小题4:The boy doesn’t show good manners to others. He is (polite).
小题5:I think his idea is worth (consider).
患者男性,48岁,反复咳嗽、咳黄痰30余年,间断咯血4次。此次因咳嗽加重,发热入院。
关于支气管扩张患者咯血,下列描述正确的是()
A.每日咯血量在100ml以内为小量咯血
B.每日咯血量在100~500ml之间为中量咯血
C.每日咯血量在500ml以上为大量咯血
D.一次咯血量大于100ml为大量咯血
E.以上均正确