对进口列入《限制进口可用作原料的废物目录》及《自动进口许可证管理类可用作原料的废物目

已知点A（-2，0）B（4，0）C（-2，-3）。

（1）求A、B两点之间的距离。

（2）求点C到X轴的距离。

（3）求△ABC的面积。

患者，女，65岁，突然右上腹钻顶样疼痛6小时，伴轻度发热，恶心、呕吐，无黄疸。以往有胆囊结石病史。查体：痛苦面容，腹平、肌不紧，右上腹轻压痛，未触及肿大的胆囊，墨菲征（一）。

该患者最有可能的诊断是（）。

A.胆道蛔虫病

B.胆囊结石合并感染

C.胆总管结石合并感染

D.急性胃穿孔

E.急性胃肠炎

男性，18岁。反复午后发热1个月，体温在37.3～37.8℃，疲乏无力，消瘦。近一周咳嗽，偶尔咯血性痰，夜间盗汗，无胸痛、气短。外院X线检查见右锁骨上斑片状阴影，痰结核菌检查阴性。

确诊后治疗应选择的药物治疗是（）

A.青霉素静滴

B.阿奇霉素静滴

C.抗结核联合化疗

D.庆大霉素静滴

E.氟喹诺酮类药物静滴

           for the timely investment from the general public, our company would not be developing so fast as it is.

A．Had it not been

B．Were it not

C．Was it not

D．Should it not be

In low-speed network，it is usually adequate to wait for congestion to occur and then react to it bytelling the source of packets to slow down．In high-speed networks，this approach often works poorly，because in the (71) between sending the notification and notification arriving at the source，thousands of additional (72) may arrive．In ATM network，a major tool for preventing (73) is (74) control．When a host wants a new virtual (75) ，it must describe the traffic to be offeredand the service expected．

（71）处填（）。

A．interval

B．time

C．slot

D．delay