A:
B:
C:
D:
根据句意及首字母提示完成单词 Do you like eating ice cream in s ____?M ____ is not everything, but we must have it. Don't run when you see a dog. It is d____. Miss Smith is a good teacher, and she t____ us English.As a reporter, he works for a m____.
在横线上填上“ <、﹥ 或=”。
14____16 15____5 8____16
16____13 17____17 9____9
如图,AO⊥平面α,点O为垂足,BC⊂平面α,BC⊥OB,若∠ABO=π4,∠COB=π6,则cos∠BAC=____
选词填空
这些日子,家中光景很是( ),一半为了丧事,一半为了父亲赋闲。
把磨得很光的铅片和金片紧压在一起,在室温下放置五年后再将它们切开,可以看到它们相互渗入约1 mm深.这个现象说明( )