9.足球运动员在比赛中腿部受伤时医生常喷洒一种液体物质使受伤部位皮肤表面温度骤然下降,减轻伤员的痛感。这种物质是( )
A.碘酒 B.氟里昂 C.氯乙烷 D.酒精
8.既能发生皂化反应,又能发生氢化反应的是( )
A.软脂酸甘油酯 B.硬脂酸甘油酯 C.油酸 D.油酸甘油酯
7.有溶液NaOH、NaHCO3溶液、CH3COOH、C2H5OH四种试剂。下列有机物在一定条件下能分别跟这四种试剂发生反应的是( )
A CH2=CH-CH2-OH B H3C--COOCH3
C HO--CH2OH D HOCH2--COOH
5.有关化学用语正确的是( )
A 乙烯的最简式C2H4 B 乙醇的结构简式C2H6O
C 四氯化碳的电子式 D 臭氧的分子式O3
4.心炯胺是治疗冠心病的药物。它具有如下结构简式:( )
下列关于心炯胺的描述,错误的( )
A.可以在催化剂作用下和溴反应 B.可以和银氨溶液发生银镜反应
C.可以和氢溴酸反应 D.可以和浓硫酸与浓硝酸的是混合液反应、
3. 用于制造隐形飞机物质具有吸收微波的功能,其主要成分的结构 如图,它属于
A.无机物 B.烃
C.高分子化合物 D.有机物
2.聚丙烯酸酯类涂料是目前市场上流行的墙面涂料之一,它具有弹性好,不易老化、耐擦洗、色泽亮丽等优点。右边是聚丙烯酸酯的结构简式,它属于( )。
①无机化合物 ②有机化合物 ③高分子化合物 ④离子化合物 ⑤共价 化合物
A.①③④ B.①③⑤ C.②③⑤ D.②③④
1.尿素是第一个人工合成的有机物,下列关于尿素的叙述不正确的是( )
A.尿素是一种氮肥 B.尿素是人体新陈代谢的一种产物
C.尿素能发生水解反应 D.尿素是一种酸性物质
4. [范文点评]
1)文中恰当地运用了转折,并列的连词,副词,上下衔接自然,如:what’s more;last but not least; however; what’s worse…
2)多种句型表达方式,同位语从句;原因状语从句;形式主语句式等… 如:…hold the opinion (opposite opinion) that…; it is convenient for people to ….
3)文章观点主题句与论据分类清晰,层次分明。如:Many people hold the opinion that the advantage of BRT system far outweighs the disadvantages…… However, some people hold the opposite opinion that BRT system may give rise to a lot of problems,(观点主题句)
三,举一反三
[习作1]
假如你是一位导游。通过观察游客的行为变化,说明大众环保意识日益增强。请根据下面表格的中文提示,写一篇短文谈谈此种现象
几年前某些游客的行为 |
现在大多数游客的表现 |
乱扔废物,如塑料带,罐头盒,费纸等。 |
随身带走垃圾。 |
乱刻乱画,攀树摘花。 |
爱护花木. |
在林中吸烟,引起火灾。 |
林区不吸烟,以防火灾。 |
[写作内容]
1)请根据以上提示,谈谈这一现象,文章的开头已经给出。
2)文章必须包括所有提示要点,但不要逐条译成英语。
[写作要求]
只能使用5个句子表达全部的内容。
[评分标准]
句子结构准确,信息内容完整和连贯。
With the time on, there is an increasing tendency that more and more tourists have been paying greater attention to environment protection._____________________________________ _______________________________________________________________________________ ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________.
3.[参考范文]
According to the Guangzhou government Office, the bus rapid transit (BRT) system will be piloted on Zhongshan Road (from Tianhe intersection to Xiayuan Section) this year. The BRT system will be adopted throughout the city before the 2010 Asian Games, said Mayor Zhang Guangning. Many people hold the opinion that the advantage of BRT system far outweighs the disadvantages, because it shows concern for common passengers. What’s more, the performance of BRT system will surely speed up the ride and save much time. Last but not least, it will definitely bring about a great advance of public buses and also reduces air pollution. However, some people hold the opposite opinion that BRT system may give rise to a lot of problems, such as
more people needed to manage the traffic. What’s worse, it is inconvenient for people to cross motor and bicycle lanes when getting off the buses.
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