下列说法正确的是 [ ] A．实验室里需要480mL2.0mol/L的氢氧化钠溶

发布时间：2017-07-07 18:09 │ 来源：www.tikuol.com

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问题：

下列说法正确的是 [ ]

A．实验室里需要480 mL 2.0 mol/L的氢氧化钠溶液，配制溶液时先称量氢氧化钠固体38.4 g，然后再按照溶解、冷却、洗涤、定容、摇匀的步骤进行操作

B．用标准盐酸滴定NaOH溶液测其浓度时，酸式滴定管用蒸馏水洗涤后，没用标准盐酸润洗，直接装标准盐酸滴定，所测的碱液浓度偏低

C．蒸发硫酸铜溶液时，蒸发皿放在石棉网上加热，并用坩埚钳夹取蒸发皿

D．向氢氧化铁胶体中逐滴加入稀硫酸，先出现红褐色沉淀，继续滴加硫酸，沉淀溶解得到黄色溶液

考点：酸碱中和滴定化学实验的基本操作配制一定物质的量浓度的溶液

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根据短文内容，完成下面表格。

Taiwan lies in the southeast of China. It's the largest island in China. It has an area of about 36, 000
square kilometers and it has a population of over 20, 000, 000. It is rich in natural resources. Bananas, rice,
tea and so on are famous at home and abroad. Clothes, food and so on are also well-known all over the
world. Its beautiful scenery, such as Sun-Moon Lake and Mount Ali, and its wonderful climate make more
and more travelers come to Taiwan.
Taiwan has been part of China since ancient times. Most people of the island came from Fujian and
Guangdong provinces. All the people on both sides of the strait (海峡) have a strong wish to unite our
motherland (祖国统一).

	Taiwan Island
Location (地点)	In the 1_______ of China.
Area	About 2_______ square kilometers.
3_______	Over 20, 000, 000.
Natural resources	Bananas, 4_______, tea and so on.
Scenery	5_______ and Mount Ali.

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Beijing is the 20th city _____ holds the Olympic Games. [ ]

A. where

B. that

C. whom

D. which

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尿毒症必有的症状是

A．皮肤瘙痒

B．贫血

C．高血压

D．恶心、呕吐

E．少尿

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