判断以下反应能否进行,写出能反应的化学表达式,并注明反应类型. (1)氢氧化钠和

题型:问答题

问题:

判断以下反应能否进行,写出能反应的化学表达式,并注明反应类型.

(1)氢氧化钠和盐酸

(2)铁与硫酸铜溶液

(3)银与盐酸

(4)Na2CO3+HCl.

考点:化学反应方程式的书写文字表达式
题型:问答题

A man was looking for things of the old times. One day he came to a village and found a blue bowl. It looked very old. The bowl was on the ground and a cat was drinking milk from it. A farmer,the owner of the cat,was sitting beside the bowl. The man did not want the farmer to know that he was interested in the bowl. So he said to him in a soft voice,“What a nice cat you have! Will you sell it to me?”

“How much will you give me for the cat?”the farmer asked.

“Thirty dollars. Would that be enough?”Later,the farmer agreed. After he paid the farmer,the man said,“This cat is used to eating with his bowl. May I take this bowl with the cat?”But the farmer said,“I'm sorry I can't give you the bowl. Thanks to(多亏了) the bowl,I have sold thirty cats.”

根据短文内容,判断下列句子正误。正确的用“A”表示,不正确的用“B”表示。

小题1:A man was looking for old things.

小题2:One day he found a blue bowl in a town.

小题3:The man wanted to buy the cat because he it was very nice.

小题4:The man thought he could easily get the bowl after he bought the cat.

小题5:From the story we can see that the farmer wasn’t clever.

题型:问答题

某稀溶液中含有Fe(NO3)3、Cu(NO3)2、HNO3,若向其中逐渐加入铁粉,溶液中Fe2+浓度和加入铁粉的物质的量之间的关系如图所示。则稀溶液中Fe(NO3)3、Cu(NO3)2、HNO3的物质的量浓度之比为(  )

A.1∶1∶1

B.1∶3∶1

C.3∶3∶8

D.1∶1∶4

题型:问答题

患儿女,10个月,因发热、腹泻黄色稀水便2天入院。尿量明显减少。体格检查:T38.2℃,P138次/分,R33次/分,体重9kg,精神萎靡,哭时泪少,皮肤弹性差,前囟及眼窝明显凹陷,咽红唇干,心肺听诊正常,腹平软,无压痛,肝右肋下1cm,肠鸣音10次/分。

目前应考虑可能的问题是()

A.低钙血症

B.酸中毒加重

C.低钾血症

D.心肌炎

E.低血糖

F.脑水肿

题型:问答题
只列式不计算:
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1
5
,桔树比苹果树多多少株?
②书店运进科技书和文艺书共3500册,文艺书与科技书册数的比是9:5,运进科技书多少册?
③一个圆柱的底面半径12厘米,高5厘米,那么体积是多少立方厘米?
题型:问答题

《商业银行理财产品销售管理办法》规定,商业银行销售风险评级为()(含)以上理财产品时,除非与客户书面约定,否则应当在商业银行网点进行。

A.四级

B.三级

C.二级

D.五级

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