微距摄影是指照相机通过镜头拍摄与物体等大或稍小的图象.如图所示,一次微距摄影中,拍摄图象与物体等大,光学镜头等效为一个凸透镜,则物体一定位于
My parents gave red packets to my cousin every Spring Festival _______she got a job, because she said she was able to make money.( )
A.afterB.whenC.untilD.since
Peng Min finally became the winner of _____season of CCTV's Chinese Poetry Conference.( )
A.fiveB.fifthC.the fifthD.fifths
China sent up the final satellite of Beidou Navigation satellite System (北斗卫星导航系统)from Xichang Satellite Center ______June 23,2020.( )
A.atB.inC.toD.on
Mum, I read a book about wild animals today. Some of them are in danger.
____. We shouldn’t buy fur coats any more.( )
A.It's a great pityB.It doesn’t matter
C.Never mindD.My pleasure
I can’t find you.
I don't know________ , I’m on the left side of a tree.( )
A.who I amB.who am IC.where I amD.where am I