已知∠I=40°,则∠I的余角度数是
A.150°
B.140°
C.50°
D.60°
C.
题目分析::∵∠1=40°,
∴∠1的余角=90°-∠1=90°-40°=50°.
故选C.
给多音字注音并组词。
当 ( ) ( )
笼 ( ) ( )
涨 ( ) ( )
似 ( ) ( )
. Students should _____ everything important their teachers give in class.
A.set up
B.set out
C.set aside
D.set down