根据上下文及中文提示,写出单词,使短文完整、正确、通顺。每空一词。 Mrs Gr

题型:听力题

问题:

根据上下文及中文提示,写出单词,使短文完整、正确、通顺。每空一词。

Mrs Green was on vacation with her friends. Her husband and children should do housework while she was away. When Mr Green   小题1:   (回来)  home from work, his children were jumping and    小题2:     (呼叫) in the living room. The kids were     小题3:    (不安的) when they saw their father. “What were you doing just now?” Mr Green asked. But there was no answer. All of them kept in    小题4: (沉默). Mr Green found his youngest son, Ben, was     小题5:    (单独地) in the     小题6:  (厨房). He was washing the dishes.

“What happened to you?”

“Dad, they asked to do all the      小题7:   (家务) while they were playing.”

“Is that      小题8:    (真实的)?” Mr Green got angry. He turned to the other kids. “my dear children, all of you should stay at home and cook dinner by yourselves      小题9:    (除了) Ben. I’ll go out to dinner and see a movie with him      小题10:   (今晚).”

考点:物主代词单词、词组
题型:听力题

异烟肼中应检查的特殊杂质是()

A.游离水杨酸

B.游离肼

C.洋地黄皂苷

D.其他甾体

E.酮体

题型:听力题

海洋是个巨大的资源宝库,它不仅孕育着无数的生命,还含有大量的化学物质.

I.海水提溴.从海水中提取的溴约占世界溴产量的,工业上常用“吹出法”制溴,其工艺流程如下:

试回答:

(1)步骤②中的化学方程式为2NaBr+Cl2=2NaCl+Br2,其反应类型是 _________

(2)非金属单质也具有类似金属与盐溶液之间的反应规律,如在溶液中可发生下列反应:Cl2+2KBr=2KCl+Br2;Br2+2KI=2KBr+I2 由此可判断Cl2、I2、Br2活动性由强到弱顺序是 _________

Ⅱ.食盐制碱.我国著名化学家侯德榜发明的联合制碱法的主要过程是:

①向浓氨水中通入足量的二氧化碳生成碳酸氢铵溶液;

②然后向溶液中加入食盐细粒充分搅拌,控制条件,利用物质的性质不同,两者发生反应生成碳酸氢钠,便有晶体析出;

③将析出的碳酸氢钠加热制得碳酸钠、二氧化碳和水.四种盐在不同温度下的溶解度表:

请回答:

(1)碳酸氢铵的化学式是 _________

(2)由上表分析过程②中能发生反应的原因是 _________

(3)过程③中反应的化学方程式是 _________

题型:听力题

牙周病正畸治疗后保持与一般正畸患者有何不同().

A.没什么不同

B.需要长期保持

C.允许有较多牙移动

D.吃饭时不必戴用

E.可采用正位器作牙列最后精细调整移动的保持法

题型:听力题

对于进口旧机电产品,海关凭《旧机电产品装运前预检验备案书》验放。

题型:听力题

已知的最大恐龙是什么?

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