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人类生活和工农业生产都离不开水，下图是自来水厂净化水的过程示意图：请根据图示回答下列问题：

（1）自来水厂生产自来水时，使用的净水方法有_____（填序号）。

A．沉淀       B．过滤       C．煮沸       D．蒸馏       E．吸附

（2）取水后加入絮凝剂（明矾）的作用是_____________________。

（3）自来水厂用ClO2，漂白粉[有效成分为Ca(ClO)2]可用于饮用水消毒。工业上制备漂白粉的化学方程式为：2Cl2＋2Ca(OH)2=X＋Ca(ClO)2＋2H2O, X的化学式为               。

（4）节约用水人人有责，请举出一种节水的措施_______________。

答案

（1 ）ABE； 

（2）产生胶状物，吸附杂质，使杂质沉降；

（3）CaCl2 ；

（4 ）生活节水：节水器具，中水利用农业节水：节水灌溉，再生水灌溉工业节水：技术改造，冷却水回收三产节水：节水器具生态节水：节水灌溉绿地，中水利用企业，建立相关用水制度监管浪费行为。收集雨水浇灌绿地，清洁使用，做好员工的思想教育。个人，洗脸水、洗脚水可以冲马桶，养成随手关上水龙头的习惯等等

阅读理解

　The word“day” has two meanings. When we talk about the number of days in a year,  we are using “day” to mean 24 hours. But when we talk about day and night,  we are using“day” to mean the time between sunrise and sunset. Since the earth looks like a ball,  the sun can shine on only half of it at a time. Always one half of the earth is having day and the other half night. A place is moved from day into night and from night into day over and over by the spinning（旋转）of the earth. At the equator（赤道）day and night are sometimes the same length（长度）. They are each twelve hours long. The sun rises at 6 o’clock in the morning and sets at 6 o’clock in the evening. For six months the North Pole is tilted（倾斜）toward the sun. In those months the Northern Hemisphere（半球）gets more hours of sunlight than the Southern Hemisphere. Days are longer than nights. South of the equator nights are longer than days. For the other six months the North Pole is tilted away from the sun. Then the Southern Hemisphere gets more sunlight. Days are longer than nights. North of the equator nights are longer than days. Winter is the season of long nights. Summer is the season of long days.

小题1:When the Western Hemisphere is having day,  the Eastern Hemisphere is having ________.

A．both day and night

B．day

C．neither day nor night

D．night小题2:A place is moved from day into night and from night into day over and over by ________ of the earth.

A．the pushing

B．the pulling

C．the spinning

D．the passing小题3:．At the equator day is as long as night ________.

A．sometimes

B．never

C．usually

D．always小题4:When the North Pole is tilted toward the sun,  the Northern Hemisphere gets ________ sunlight.

A．less

B．more

C．all

D．no小题5:．When it is winter in China,  ________.

A．the USA is tilted toward the sun

B．the South Pole is tilted away from the sun

C．the North Pole is tilted toward the sun

D．the North Pole is tilted away from the sun
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单项选择题

办理非交易转按贷款时，管户客户经理在CMS系统中录入信贷资料，在借款用途栏内录入（）字段，并打印借据，按规定由借贷双方签名盖章后交由会计部门放款。

A、“非交易”

B、“交易”

C、“购房”

D、“一手楼按揭”
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