A:1202154
B:2021054
C:2022060
D:1a2010
从下列方框中选出适当的答语。
A.She's sending her grandpa an e-mail.
B.I usually do my homework.
C.Because I can plant trees.
D.June.He can go swimming with his friend.
E.It's in September or October.
光的世界是丰富多彩的,以下关于光现象的说法正确的是(
眼镜是人们常用的护眼工具,如图是一款变色眼镜的示意图: