下列化学方程式符合题意且书写正确的是()。 A.验证铜的金属活动性比银强:Cu+

题型:选择题

问题:

下列化学方程式符合题意且书写正确的是(  )。

A.验证铜的金属活动性比银强:Cu+2AgCl→CuCl2+2Ag

B.除去烧碱溶液中混有少量纯碱:Na2CO3+2 HCl→2NaCl+ H2O+CO2

C.制取少量的硫酸镁:MgCl2+Na2SO4→MgSO4+2NaCl

D.用稀盐酸除去水垢:CaCO3+2HCl→CaCl2+H2O+CO2

考点:化学反应方程式的书写化学图标化学反应方程式的配平化学反应方程式的意义
题型:选择题

运用MRP的原则,在配送环境下,从数量和提前期等方面来确定物料配送需求的一种动态方法是______。

A.MRPII

B.ERP

C.JIT

D.DRP

题型:选择题

潜水员由水下10m上浮到水下6m时它受到的(  )

A.压强增大,浮力不变

B.压强减小,浮力减小

C.压强减小,浮力不变

D.压强增大,浮力减小

题型:选择题


What brings a nation together? Of the four choices — shared values, language, history, and religion, it’s shared values. In our latest poll (民意调査), seven out of 16 countries chose values as the greatest factor (因索)bringing a nation together, and six preferred language. Both choices scored high in the poll, suggesting that our values and how we express them are closely linked Still, history was not forgotten in some countries, particularly in Mexico and Russia. Even Canada and the United States chose national histories as the second-most important factor uniting their people. The biggest surprise? Not one country picked religion as its top choice.
Respect your elders
In most countries, the oldest
generation considered values more important to a nation than did those who are under 45 years old.
Do you speak Canadian?
Language scored lower in Canada than in all other countries polled, perhaps because the country speaks two official languages, French and English.
Church and state
Most people polled do not connect their religious beliefs to their national pride. Religion ranked last in 13 countries — with France scoring it at 1%, the lowest of all.
小题1:According to the poll, what was the most important factor in bringing a nation together?
A.Language.B.Values.C.History.D.Religion.
小题2:In which country did language score the lowest in their national pride?   
A.Canada.B.Mexico.C.France.D.America.
小题3:According to the charts, shared values and language were considered equally important in         .  
A.AustraliaB.BrazilC.ChinaD.India
题型:选择题

读我国主要畜种分布图,下列说法不正确的是

[ ]

A.三河马、三河牛分布A牧区

B.新疆的细毛羊分布在B牧区

C.宁夏的滩羊分布在C牧区

D.西藏牦牛分布在D牧区

题型:选择题

目前最常用的最有效的引产方法是

A.利凡诺药物引产
B.水囊引产
C.人工破膜弓1产
D.前列腺素引产
E.催产素引产

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