题目内容

【题目】某化学兴趣小组欲研究H2SO4、NaCl、KCl、Na2CO3、FeCl3、NaOH的性质，对于如何研究，他们设计了两种实验方案。

方案①：将它们按照酸、碱、盐分类，然后分别溶于水得到溶液，进行实验；

方案②：将它们按照钠盐、钾盐、铁盐和其他化合物分类，然后分别溶于水得到溶液，进行实验。

下列说法正确的是

A．常温时，将少量铜粉分别投入上述溶液中，按照方案①的分类，能够完全溶解铜粉的只有酸(稀硫酸)溶液

B．取某种溶液，在其中加入上述方案②中的钾盐溶液，有白色沉淀产生，再加入稀硝酸，沉淀不消失，则该溶液中含有Ag+

C．按照方案①的分类，属于碱的有Na2CO3、NaOH

D．按照方案②的分类，属于钠盐的有NaCl、Na2CO3、NaOH

【答案】B

【解析】稀硫酸与铜不反应，A项错误。Na2CO3属于盐，C项错误。NaOH属于碱，不属于钠盐，D项错误。

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【题目】语法填空（每小题1分，满分10分）

阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。

Three months ago George was at the Red Sea and when he came back, brown and happy, he said that he had never had 1 a terrific holiday before. As he was very good at swimming and diving and was ___2___ (concern) with biology, he managed to join a scientific research group 3 was studying the sea life of the Red Sea coast at that time. The researchers allowed him 4 (help) them in their work and gave him a special diving suit, so he was able to stay deep in the sea for quite a long time. George was amazed at 5 beautiful the underwater world was. Millions of brightly colored fish moved 6 (busy) around him. Crabs, turtles, and sea snakes looked at him curiously and then hurried to do their underwater business. Once, when George followed a little crab, a huge fish appeared from behind a coral rock. Luckily, the shark took no interest 7 him and disappeared into the 8 (deep) as if it had much more important things to do.

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【题目】七选五

根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

It is said that farmers or peasants, especially those in developing countries, are often criticized for cutting down forests. But a new study suggests that many farmers recognize the value of keeping trees.

Researchers using satellite images found at least ten percent trees cover on more than one billion hectares of farmland. 1 . Earlier estimates were much lower but incomplete. The authors of the new study say it may still underestimate the true extent worldwide.

The study found the most trees cover in South America. 2 . North Africa and West Asia have the least.

The study found that climate conditions alone could not explain the amount of trees cover in different areas. 3 . There are areas with few trees but also few people, and areas with many trees and many people. The findings suggest that things like land rights, markets or government policies can influence tree planting and protection.

Dennis Garrity heads the World Agroforestry Center. 4 . The problem, he says, is that policy makers and planners have been slow to recognize this and to support such efforts.

The satellite images may not show what the farmers are using the trees for, but trees provide nuts, fruit, wood and other products. 5 . Even under drought (干旱) conditions, trees can often provide food and a way to earn money until the next growing season.

Some trees act as natural fertilizers. They take nitrogen (氮气) out of the air and put it in the soil. Scientists at the Center say the use of fertilizer trees can reduce the need for chemical nitrogen by up to three-fourths. Trees also capture carbon dioxide, a gas linked to climate change.

A. Nor could the size of nearby populations, meaning people and trees can live together.

B. He says farmers are acting on their own to protect and plant trees.

C. Almost all of it is covered by trees.

D. They also help prevent soil loss and protect water supplies.

E. He devotes most of his time to making people realize its importance.

F. That is nearly half of the farmland in the world.

G. Next comes Africa south of the Sahara, followed by Southeast Asia.

【题目】书面表达（满分20分）

(2017·北京)你的英国朋友Jim所在的学校要组织学生来中国旅行，有两条线路可以选择：＂长江之行＂或者＂泰山之旅＂。Jim来信希望你能给些建议。请你给他回信，内容包括：

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【题目】

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【1】她打算一毕业就申请工作以便试试自己的能力。

She a job as soon as she graduates so as to her ability.

【2】作为一名党员，他在长征途中发挥了重要的作用，不愧为一个英雄。

Being a Party member, he during the Long March. He a hero.

【3】爵士乐植根于美国黑人的民歌中。20世纪早期，它被R&B所取代。

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【4】从R&B音乐中发展出了摇滚乐，萨姆.菲利普斯试图将其带给白人听众。

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【题目】国学，泛指中国传统文化。近年来，借助电视、网络等现代手段，通过专家通俗化的解读在社会上兴起了“国学热”。中国传统文化强调家国至上，强调礼之用、和为贵，强调天酬勤、大无畏，强调坚毅自强，所有这些都对家庭、国家和社会起到了巨大的维系和调节作用。

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【题目】根据汉语意思完成句子

1. 毫无疑问，他是一个诚实的人。（doubt）

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【题目】七选五

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Culture means any human behavior that is learned in human society. All of the meaningful parts of a culture are passed on to different generations through tradition or social learning. 1 Culture exists in agricultural as well as industrialized (工业化的) societies.

Culture is necessary for the survival (幸存) of human beings. Practically everything humans know, think, value, feel, and do is learned through taking part in a cultural system. 2 Here is one of the cases of children growing up apart from human society. In the province of Midnapore in India, a scientist was told by local villagers that there were “ghost (鬼)” in the forest. Upon looking into the case, he found that two children appeared to have been living with a group of wolves in the forest. 3 In his diary, the scientist describes his first view of Kamala and Amala (the names of the children).

Kamala and Amala were terrible-looking creatures; the heads were like big balls covering the shoulders. Their eyes were bright and sharp, unlike human eyes. They were very fond of raw meat and raw milk. 4

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