题目内容

【题目】黄河入海水量l951年大约为500亿立方米，2010年大约为l40亿立方米，总体呈下降趋势。据此完成下列问题。

【1】导致黄河入海水量变化的主要原因最可能是

A．上游水电站增多 B．中游水土流失加剧

C．下游降水量减少 D．流域内用水量增多

【2】黄河入海水量减少带来的主要影响是

A．三角洲土壤盐渍化减轻 B．三角洲扩展速度减慢

C．入海口河水含沙量增加 D．河口地区的气候变干

【答案】

【1】D

【2】B

【解析】

试题分析：

【1】水电站主要是发电，其改变河流季节流量，但对径流总量影响不大，A错。水土流失改变的是河流含沙量，而不是径流量，B错。黄河径流主要来自中上游地区，下游入水量很小，影响很小，C错。随经济发展，黄河流域内工农业用水量大增，本地区极端缺水，只能大量利用黄河水，导致黄河入海流量锐减，D正确。

【2】，黄河入海水量大减，导致海水入侵，土壤盐渍化增加，而不是减轻，A错。来水量减少，携带来的泥沙量就少，三角洲扩展速度减慢，B正确。黄河入海水量减少，携带泥沙能力减弱，含沙量是二者的比值，因此，入海口河水含沙量不一定增加，C错。黄河来水量减少对河口湿地带来不利影响，但这对当地气候影响并非决定因素，D错。

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【题目】请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

注意：每个空格只填1个单词。

Do you think you could learn a language in an hour?

We know, we know! We would expect you to be skeptical. It’s ridiculous to think you can learn a language in 60 minutes. You wouldn’t even get through the As in a bilingual dictionary in that amount of time! Best-case situation: in an hour, most of us could probably stuff a few words and ready-made phrases into our short-term memory (with a high likelihood of forgetting it all by the following day). Accomplishing anything more than that in one hour? Impossible. Unless…

We posed the one-hour language challenge to four polyglots(通晓数种语言的人) who are experts on how to study languages. To keep the challenge from becoming completely impossible, we gave them a bit of a break: to learn Romanian in one hour. Why Romanian? Because it’s a Romance language and shares many similarities with the languages that the polyglots already know: French, Spanish, Italian, Portuguese. And to make sure their hour of learning was as effective as possible, all of them were assigned a personal Romanian tutor to help coach them on their way to success.

Although each polyglot has a different technique for picking up and remembering a new language, all four methods offer valuable insights to anyone, from casual learners to hard-core language enthusiasts.

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【3】 limits 1 hour

1 hour

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【9】

Matthew: try to【10】 similar words and patterns with familiar languages

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【题目】完形填空

阅读下面短文，从短文后各题所给的四个选项(A、B、C和D) 中，选出可以填入空白处的最佳选项。

The secret to happiness is keeping busy, research has found.

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