如图,在Rt△ABC中,∠B=90°,∠A=40°,AC的垂直平分线MN与AB交于点D,则∠BCD的度数是 _________ 度.
10
We saw flowers and trees everywhere.
A.over there
B.here and there
C.somewhere
D.anywhere
检验男女童单服装样板的腰围,应沿腰宽中间横量乘2,松紧裤腰横量乘2,其公差范围是()cm.
A、+-1.4
B、+-1~1.5
C、+-1.5~2
D、+-1~2