若有定义和语句：
int**pp,*p,a=20,b=10；
pp=&p;p=&a;p=&b;printf(%d,%d\n",*p,**pp)；
则输出结果是( )。

A) 20,10
B) 20,20
C) 10,20
D) 10,10

What is the sea horse’s prehensile tail used for().

A. Propelling it through moving currents.

B. Grasping sea grass or coral to stabilize it.

C. Fending off attacks form predators.

D. Moving food to its mouth, like an elephant’s trunk.