A:①②
B:②④
C:①③
D:③④
下列各句中加线的成语使用恰当的一句是( )
“子欲养而亲不待”的意思是:当子女想到要孝敬父母的时候,父母却不健在了。这启示我们( )
A
Name
From
Hobby(爱好)
Father
Mother
Lucy
England
Playing tennis
Paul, a policeman
Sara, a worker
Mike
America
Writing
Tim, a driver
Susan, a teacher
Chen Yao
Beijing, China
Drawing
Chen Wei, a teacher
Wang Mengyi, a hotel manager
Liu Ming
Weifang, China
Playing basketball
Liu Guangfu, a doctor
Lin Fang, a worker
已知0,0,4,-1两点到直线mx+m2y+6=0的距离相等,那么m可取得不同实数值个数为( )
人们常用谜语:“麻屋子、红帐子,里面住着个白胖子”来猜花生.在植物的发育中,“麻屋子”、“红帐子”、“白胖子”分别是由什么结构发育而来的( )