A:等于 −12
B:等于0
C:等于 12
D:不存在
在横线填上“>” “<”或“=”。
36+15____6×8 8×2____59-38
3×8____4×9-12 91-25____8×8
8×4+8____5×8 0×8____2×3-5
从方框中选出合适的单词补全下列短文,每词限用一次。
spring winter autumn summer four
Beijing is a nice place.There are ____seasons in a year.In ____, It's warm and sunny.In ____, it's hot. In ____,it's always cool and windy. In ____,it's cold. I like cool days and bright sunshine.So I like Beijing's autumn best.
下列各种图形相似的是 ( )
父亲有耳垂,母亲也有耳垂,孩子无耳垂.可以推知父母的基因组成分别是( )