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①出门在外，口渴的时候我们都习惯买一瓶水喝，瓶装水给我们的印象是干净和方便，尤其是高档瓶装水都会标榜自己“出身清白”，“从未受到过人类污染”。例如,“王岛云雨”产自澳大利亚塔斯马尼亚岛,那里号称拥有世界上“最干净的空气”,雨水自然清洁无比；“公元前1万年”产自号称“地球上最古老的水源”——加拿大卑诗省沿岸的冰川，水质更是纯正无比。然而，科学家指出，塑料瓶装水也有可能“不干净”。
②英国化学研究人员威廉·肖迪克表示，装饮用水的塑料瓶生产过程就有污染隐患，因为在制造瓶子的过程中，会使用含有锑元素的化合物作催化剂，随着塑料瓶的成型，锑元素也进入了塑料中。塑料瓶可能会持续向瓶中的水溶解重金属元素锑,这种元素长期积聚在体内可能危害健康。威廉·肖迪克对当地的15种热销瓶装水进行化学检验，结果发现天然地下水中的锑含量是万亿分之一，而刚出厂的瓶装水的锑含量平均为万亿分之一百六十。时间越长，塑料瓶中的锑元素在水中的溶解量越大，这个过程就像泡茶一样。出厂3个月后，瓶装水中的锑元素的含量竟然增加了一倍。然而，现在市场上大多数瓶装水包装上注明的保质期大多是24个月。另外，温度越高，锑元素在水中的溶解量越大，而人们对瓶装水需求量较大的季节是温度高的夏天。肖迪克表示，虽然摄入极少量的锑元素不会导致人生病，但是大量摄入则会诱发呕吐，甚至可能致命。
③美国哈佛大学的研究人员米歇尔等人发现，不少塑料瓶在加工过程中会加入名为“双酚A”（BPA）的化学物质。这种化学物质与出生缺陷、发育问题、心脏病和糖尿病患病风险高有关联。专家对它可能对人体健康造成的影响表示担忧，而一些国家已将该物质正式列为有毒物质。
④此外，荷兰研究者发现，瓶装矿泉水经常被细菌和真菌污染，污染的瓶装矿泉水对健康个体致病的危险可能有限，但对于免疫功能低下的病人和婴儿，则有更高的感染危险。
⑤英国“水与环境管理协会”的执行主席尼克·里夫斯还表示，瓶装水对环境的污染也不容忽视。全世界每年用于制造塑料瓶的塑料为270万吨，这些塑料的原料大多是从石油中提取的，仅在美国，制造这些塑料瓶就要消耗150万桶石油，这些石油可以供10万辆汽车使用一年。86%的塑料水瓶最后都变成了垃圾，需要400年至1000年才能降解。这些塑料垃圾在燃烧时会产生有毒气体和含有重金属的灰烬。
（摘自2011年5月《知识就是力量》，略有删改）
A.随着温度增高，时间增加，塑料瓶中的锑元素在水中溶解量会越大。
B.重金属元素锑一旦被人体摄入，就会诱发呕吐，甚至可能致命。
C.全世界每年用于制造塑料瓶的塑料为270万吨，这些塑料的原料大多是从石油中提取的。
D.专家认为，在塑料瓶加工过程中所加入的名为“双酚A”（BPA）的化学物质可能对人体健康造成影响。
【小题1】下列句中划线词语能否删去？为什么（4分）
(1)出厂3个月后，瓶装水中的锑元素的含量竟然增加了一倍。
(2)瓶装矿泉水经常被细菌和真菌污染，污染的瓶装矿泉水对健康个体致病的危险可能有限， 查看习题详情和答案>>
In a clothes shop, she finds an orange coat. That’s her favourite colour. She tries it on, but it is too . She wants a larger (较大的) one. But the larger one is not . Grace doesn’t like other colours. Her mother says, “ go to another shop to have a look.” Then they go out of the shop and come into the next one.
This shop is very big and there many kinds of coats. Grace likes an orange one and asks, “ is it?”
“538 yuan,” answers the shop assistant (店员).
Grace’s mother it is too expensive and she doesn’t have so money with her.
“Would you like this orange one? It’s only 210 yuan,” says the shop assistant.
“Oh, it looks good. Do you think so, Grace?”
“OK. Let’s it.” Grace’s mother pays for it.
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注意：1.词数：80左右；
2.调查报告的题目和开头已为你写好（不计入总词数）。
How to Reduce the Pressure
Nowadays more and more middle school students arc getting stressed in their studies.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________
阅读理解
His name is Jim Green. He is an English boy. He is my new friend. My name is Liu Mei.
This is our school. It's No.2 Middle School. My father is a teacher.Jim is eleven. I'm twelve. He is in Class Two. I'm Class Two, too. We like school.
1．My friend's family name（姓）is ____.
[ ]
A．Jim B．Green C．Liu
2．My friend is ____.
[ ]
A．twelve B．eleven C．nine
3．I am ____ than Jim.
[ ]
A．shorter（较矮的） B．younger C．older（较大的）
4．Jim and I ____ in the same class.
[ ]
A．am B．is C．are
5．My friend and I are ____.
[ ]
A．students B．girls C．teachers.
6．My friend is ____.
[ ]
A．Chinese B．English C．American
查看习题详情和答案>>通过这几单元的学习，你的阅读能力一定有较大的提高。下面的阅读理解题也一定难不住你呀！试一试！
John: Why isn't Bob at school today?
Bill: He is in bed at home with a broken leg.
John: That's too bad. What happened?
Bill: A car ran through a red light and hit him while he was on his way home after school yesterday.
John: I'm sure it was the driver's mistake.
Bill: It certainly was. Many drivers just drive carelessly though there are better roads today.
John: But there are also many cars today, and they seem to run faster and faster.
Bill: In fact, smoother(更平坦)and wider roads only bring about more dangers.
John: That's true. We can't travel fast and safely if wedon't obey(遵守)the traffic rules(交通规则).
(1)Why isn't Bob at school? ________
[ ]
A．He likes to lie in bed.
B．He wants to stay at home.
C．He can't walk.
D．He likes to drive on wide roads.
(2)What brought about Bob's trouble?
[ ]
A．Bob's absence (缺席) from school.
B．Bob's going home after school.
C．Too many traffic rules.
D．The driver's careless driving.
(3)What was the driver's mistake? ________
[ ]
A．He drove carefully on his way home.
B．He didn't obey the traffic rules.
C．He drove on smooth and wide roads.
D．He had to look out for other cars.
(4)Why do smoother and wider roads bring about more dangers? ________
[ ]
A．Because there are more and more cars.
B．Because people get broken legs easily.
C．Because there are more new traffic rules.
D．Because there are many cars and people drive fast.
(5)Traffic accidents happen easily for ________.
[ ]
A．people like travelling long distance (距离)
B．better roads today bring about more cars and the fast speed driving
C．few drivers know little about the traffic rules
D．travellers like driving to go out in the street
查看习题详情和答案>>