Lucy and Lily often talk their teachers their study at school.
A:about; with
B:with; at
C:about; for
D:with; about
观察一列数: 12 , −25 , 310 , −417 , 526 , −637 …根据规律,请你写出第10个数是____.
读拼音,写词语。
xíng tài wàn qiān
fēng luán xióng wěi
guài shí lín xún
____
填一填。
1时=____分 1时23分=____分 100分=____时____分
60秒=____分 1分10秒=____秒 110秒=____分____秒
1a-b化简为( )