—The weather is very good. Let's have a picnic. — .
A:Have fun
B:Not really
C:Sounds great
D:Not at all
计算.
96÷15=____
5.46÷42=____
下列关于植物激素或类似物的叙述,不正确的是( )
已知O为坐标原点,OP→=x,y,OA→=a,0,OB→=(0,a),OC→=3,4,记 |PA→|| PB→||PC→|中的最大值为M,当a取遍一切实数时,M的取值范围是____