正确答案: A

正确

题目：南瓜和葡萄的卷须都是茎卷须。( )

解析：A

查看原题 点击获取本科目所有试题

举一反三的答案和解析：

[单选题]下列哪个因素不影响溶液的滤过速度（ ）。

溶液体积

[单选题]BBoiler rooms are often dirty and steamy, but this one is el.ean and cool. Fox Point is a very new47-unit living building in South Bronx, one of the city’s poorest areas. Two-thirds of the people living there are formerly (以前) homeless people, whose rent is paid by the government. The rest are low-income families. The boiler room has special equipment, which produces energy for electricity and heat. It reuses heat that would otherwise be lost to the air, reducing carbon emissions(碳排放)while also cutting costs.

To show how the environment-friendly building works.

[单选题]磷钨酸H3PW12O40等杂多酸可代替浓硫酸用于乙酸乙酯的制备。下列说法不正确的是

硅钨酸H4 SiW12O40也是一种杂多酸，其中W的化合价为+8

解析：

【解析】根据题意，“H3PW12O40等杂多酸可代替浓硫酸”可类推， H3PW12O40在酯化反应中也起催化作用，A正确；我们所学的钠盐都是强电解质可以大胆判断B正确；C项可以进行观察比较得出答案。硅钨酸H4 SiW12O40 中根据化合价代数和为零推出W的化合价为+6，D错。

【考点分析】根据已有的的知识结合题目信息进行类推比较。

[单选题]在新农村建设中，某村村民以土地承包经营权入股，村集体以农田水利设施和部分建筑物入股，与一花卉经营商合作成立了股份有限公司，村民和村集体都成为公司的股东，村民同时成为公司的雇员。这种做法

①发展了农村公共服务体系 ②改变了农村集体经济的性质 ③有利于农业产业化经营 ④发展了家庭承包经营制度

③④

[单选题]You park here! It’s an emergeney exft.

mtontn’t

[单选题]There is a great deal of evidencethat music activities engage different parts of the brain .

indicating

[单选题]George is going to talk about the geography of his country, but I’d rather he_______ more on its culture.

focused