一个人站在平面镜前,当他走近平面镜时 ( )
A:像变大,像离人的距离变大
B:像变大,像离人的距离变小
C:像大小不变,像离人的距离变大
D:像大小不变,像离人的距离变小
The blue cup is his .(变为否定句)____
已知向量a→=(cos75°,sin75°),b→=(cos15°,sin15°),则a→-b→与b→的夹角为( )
Mrs. Green didn't talk to her husband for a long time, but now they ____ each other.
4箱草莓,一共有____个。