（）的画面能够给人一种纯洁、清新、亮丽、高雅的感觉。A、暗调 B、灰调 C、高调 D

纯碱在日常生活和化学工业中用途很广，如用于硬水软化、洗涤剂生产、食品加工、石油精炼、粗盐精制、玻璃制造等领域．工业上以食盐、氨气（主要由合成氨厂提供）和二氧化碳为主要原料生产纯碱．其流程如下：根据以上信息回答下列问题．

（1）盐水精制的过程是除去溶液中各种杂质的过程．为将盐水中含有的Ca²⁺、Mg²⁺等沉淀，可以向其中加入过量纯碱．此时将混合液中不溶物除去的方法是______；溶液中多余的纯碱可以加______试剂来除去．

（2）上述工艺流程中，加压条件下通入二氧化碳进行碳酸化时没有析出碳酸钠晶体，其原因是______．

（3）在氨碱工业的历史上，如何处理流程中剩余的滤液，出现了两种工艺：一是“索尔维法”，即在滤液中加入石灰水；二是我国化学家侯德榜发明的“联合制碱法”，即在滤液中加入适量氯化钠晶体．

①“索尔维法”中，滤液加石灰水前先要加热，原因是______．

②“联合制碱法”中，可以循环利用的物质是______ （用化学式表示）．

（4）若采用上述流程生产106吨纯碱，则理论上通入的二氧化碳的体积（标准状况下）不得少于______L（不考虑二氧化碳的回收利用）．

Mother’s Day is a holiday for mothers. It is celebrated(庆祝)in the United States, England, India and some other countries. In a short time, it becomes widely celebrated. Mother’s day falls on the second Sunday in May. On that day, many people send gifts(礼物)of love to their mothers.

Those whose mothers are still living often wear a pink or red rose or carnation(康乃馨)， while those whose mothers are dead wear a white one.

The idea of a day for mothers was first given by Miss Anna Jarvis of Philadelphia. As a result of her hard work, the celebration of the first American Mother’s Day was held in Philadelphia(费城） on May 10, 1908. Soon the holiday became popular all over the country and around the world.

In China, people do the same on the day for mothers. And, in some cities, people sometimes ask a song to be broadcast(广播) for his or her mother only. This might cost a little money for some of them, but, as it is said, “Love is invaluable.”

On May 8, 1999, just the day before the Mother’s Day that year, a Chinese mother was killed in criminal bombing(罪恶轰炸). Her name is Shao Yanhuan, a heroic mother. All the Chinese will remember her forever.

小题1: Mother’s Day         .

A．is a holiday for mothers

B．is celebrated in the United Stated only

C．falls on May 10 every year

D．was given by Miss Anna Jarvis小题2:What was the date of the Mother’s Day in 1999?

A．May 7.

B．May 8.

C．May 9.

D．May 10小题3:On Mother’s Day, people       .

A．send some flowers to their mothers.

B．wear a pink or red rose or carnation

C．wear a white flower

D．send gifts of love to their mothers小题4: the underlined word “invaluable” means “   ”.

A．美好的

B．无价的

C．永恒的

D．无私的小题5:Maybe you’ve known the criminal bombing, which of the following ideas do you agree to?

A．Shao Yunhuan is a heroic mother.

B．A Chinese mother is the same as an American mother.

C．The bombing cannot get away with the crime (难逃罪责).

D．All of the above

男，运动时不慎扭伤腕部，微肿，压痛，发红，应选的穴位为（）.

A.合谷、阳溪、后溪

B.曲池、小海、中渚

C.阳池、阳溪、阳谷

D.养老、大陵、阳谷

E.肩髂、合谷、后溪

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