水冲渣喷嘴一般用钢管或异径钢管做成（）形式。

When I was young, I was always frustrated ( 挫败的 ), and almost everything ended in failure. I hung out everywhere all day. Having seen me like that, my father  小题1:   to cheer me up.

One day, he gave me a cup of water and asked me to taste it. I found it   小题2:  . My father said he just put one small spoonful of salt in the cup. And then, he led 小题3:   to a lake, where he threw a big handful of salt   小题4:  the lake, scooped up a spoonful of water and let me taste it again. He asked, "Does it   小题5:  taste salty?"'  "Not at all,"  I said. My father said,  "Now you may know the root (根源) of your  小题6:  :You are just a cup of water, not a lake. Be a lake and you won't小题7:sad any more."

I came to understand my   小题8:  motive (目的): I feel unlucky  小题9:  my heart is as small as a cup of water without great ideals as a lake.

To be a lake  小题10:  great ideals, your feeling of failures and frustrations will be melted ( 融化) like the salt thrown into the lake.

正在接受九年义务教育的中学生[ ]

A．可以根据自己的喜好决定上不上学

B．要自觉遵守学校的校规校纪

C．要努力学习科学文化知识，提高自身素质

D．应该珍惜受教育的权利，自觉履行受教育的义务

最大五位数比最大六位数少1。[ ]

慢性肾炎的临床表现是（）

A.病情迁延，渐进性发展为慢性肾衰竭

B.有自愈倾向

C.起病缓慢、隐袭

D.蛋白尿、血尿、高血压、水肿

E.可有不同程度肾功能减退

《防火卷帘》规定，无机纤维复合防火卷帘使用的原料应（）

A、符合健康、环保的有关规定 

B、符合防水功能无机纤维复合材料 

C、不应使用国家明令禁止使用的材料 

D、应是钢质外表涂复一层无机纤维复合材料