企业级风险管理信息系统一般采用（）结构。 A.B/S B.A/S C.B/L D.A

阅读理解，判断正(√)误(×)。

      Ann had a dream last night. She was an astronaut. Ken was in her dream. He was an astronaut, too. They

were in the spaceship. Then they in space. There were many stars and planets. Mars was very cold. There

was no water. There was no air. There were no trees. but there were martians. They were afraid but the

martians were friendly. Soon they were friends. They had fun on mars. She had a good dream.

( ) 1. Ken had a dream last night.

( ) 2. Ann had a dream last night.

( ) 3. There were many stars and planets in the space.

( ) 4. Mars was very hot.

( ) 5. The martians were friendly.

( ) 6. Ann had a bad dream.

下列说法错误的是  (      )

A．食醋用氢氧化钠溶液滴定开始时，溶液的PH通常变化缓慢，当接近完全反应时（即滴定终点），PH出现突变，称为滴定突跃。

B．纸层析法分离铁离子和铜离子实验中，点样后的滤纸晾干后将其末端浸入展开剂中约0.5cm。

C．Cu²⁺与足量氨水反应的离子方程式 Cu²⁺+2NH₃·H₂O==Cu(OH)₂↓+2NH₄⁺

D．硝酸钾饱和溶液冷却未出现结晶时，可以用玻棒充分磨擦器皿壁促使晶体析出。

槟榔最善驱杀( )

A．蛔虫
B．绦虫
C．蛲虫
D．钩虫
E．姜片虫

根据人类进化阶段与其主要特征的对应关系填空：

沿建筑物外墙的燃气管道距住宅或公共建筑物门、窗洞口的净距要求正确的是（）

A.高压管道不应小于0.7rn

B.中压管道不应小于0.5m

C.低压管道不应小于0.3m

D.燃气管道距生产厂房建筑物门、窗洞口的净距不限