完形填空。 Gao Ming was very busy yesterday._爱下问搜题

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问题完形填空

完形填空。
Gao Ming was very busy yesterday. He got up 1 7:10 in the moming. He washed his face 2 and had some milk and bread 3 breakfast. It was a fine day. He went to school early. He had four 4 in the morning. He had a little 5 after lunch, 6 he worked very hard in class all day. He played basketball after school and then went home. On his way 7 he bought a pen. When he 8 home, he had a short rest. After that he helped his parents. He quickly had 9 and cleaned the house. He watched TV for half an hour. Then he finished his homework at half past nine. He 10 at ten o'clock.
( )1. A. on ( )2. A. sadly ( )3. A. for ( )4. A. matches ( )5. A. time ( )6. A. and ( )7. A. home ( )8. A. took ( )9. A. supper ( )10.A. went to school	B. before B. happily B. about B. games B. homework B. but B. to school B. was B. breakfast B. went to bed	C. for C. slowly C. on C. classes C. rest C. or C. to house C. left C. lunch C. got to school	D. about D. quickly D. of D. books D. housework D. for D. to hospital D. arrived D. meals D. got up

答案

1-5: BDACC 6-10: AADAB

单项选择题

某家电经销商经销某种家用电器，销售单价为1800元/台，单位商品的变动成本为500元/台，固定成本分摊为8万元，经销商要在计划期实现目标盈利4万元，计划期该家用电器的保利销售额为（）。

A．75万元

B．73万元

C．74万元

D．75万元

填空题

近年来，为提高能源利用率，西方提出共生系统．特指为提高经济效益，人类生产活动尽可能多功能化．共生工程将会大大促进化学工业的发展．

（1）由于共生工程的应用，利用发电厂产生的SO₂制成自发电池，其电池反应方程式为：2SO₂+O₂+2H₂O=2H₂SO₄，该电池电动势为1.06V．实际过程中，将SO₂通入电池的______极（填“正”或“负”），负极反应式为______．用这种方法处理SO₂废气的优点是______．

（2）以硫酸工业的SO₂尾气、氨水、石灰石、焦炭、碳酸氢铵和氯化钾等为原料，可以合成有重要应用价值的硫化钙、硫酸钾、亚硫酸铵等物质．合成路线如图：

①生产中，向反应II中的溶液中加入适量还原性很强的对苯二酚等物质，其目的是______．

②下列有关说法正确的是______．

A．反应Ⅰ中需鼓入足量空气，以保证二氧化硫充分氧化生成硫酸钙

B．反应III中发生反应的化学方程式为CaSO₄+4C

C．反应IV需控制在60～70℃，目的之一是减少碳酸氢铵的分解

D．反应V中的副产物氯化铵可用作氮肥

③反应V中选用了40%的乙二醇溶液，温度控制在25℃，此时硫酸钾的产率超过90%，选用40%的乙二醇溶液原因是______．

④（NH₄）₂SO₃可用于电厂等烟道气中脱氮，将氮氧化物转化为氮气，同时生成一种氮肥，形成共生系统．写出二氧化氮与亚硫酸铵反应的化学方程式______．