若点P（x，y）的横、纵坐标满足|2x-y+3|+（2x+y-3）2=0，则P点

If you ask many different questions, you will________all the information you need to know.

A．quit

B．acquire

C．convince

D．advocate

男孩8岁，1998年因发热1周，伴畏寒，头痛呕吐1次，纳差，便秘4天，无腹痛，病前吃私人制的冰棒。体检：体温38.8℃，神志清，淡漠，舌苔厚，心肺无异常，腹略胀，肝肋下2cm，脾肋下3cm躯干见数个淡红色斑丘疹，压之退色。

该病人治疗后热退，食欲佳，于病程18天，突然剧烈腹痛，面色苍白，脉细速。腹部检查有明显的压痛及反跳痛，最可能的情况是（）

A.肠出血

B.肠穿孔

C.急性阑尾炎

D.急性胆囊炎

E.急性胰腺炎

Originally introduced by Netscape Communications, (21) are a general mechanism which HTTP Server side applications, such as CGI (22) , can use to both store and retrieve information on the HTTP (23) side of the connection. Basically, Cookies can be used to compensate for the (24) nature of HTTR The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based (25) .

A．programs

B．applications

C．frameworks

D．constrains

对右图实验过程和结论的描述错误的是（）

A．实验可以得出的结论有：生长素能促进胚轴切段生长

B.实验可以得出的结论有：生长素只能由形态学上端向下形态学下端运输

C．不能说明单侧光照引起生长素分布不均匀&

D．取多个上胚轴切段进行重复实验使，实验更有说服力