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问题 选择题

炮筒与水平方向成α角，炮弹从炮口射出时的速度是v0，该速度在水平方向的分速度为（   ）

A．v0sinα 

B．v0cosα

C．v0/sinα 

D．v0/cosα

答案

答案：B

将炮口射出时的速度v0沿水平与竖直方向分解，得到水平方向的分速度为v0cosα，B正确。

选择题

、根据有关名著内容，完成下面的题目。

下面对有关名著名篇的说明，不正确的两项是（５分）

A．在《边城》中，翠翠爱上了天宝大老，傩送二老由于没有得到翠翠的爱，下青浪滩淹死了。

B．《家》中的女性形象生动而富有特征：温顺驯良地吞咽着旧礼教恶果的梅表姐，善良厚道的瑞珏，纯洁刚烈、以死向封建专制抗议的鸣凤，勇敢地争取个性解放的琴。

C．《红楼梦》里有句话说：“一个是阆苑仙葩，一个是美玉无瑕”，其中“阆苑仙葩”指的是贾宝玉，“美玉无瑕”指的是林黛玉。

D．“人不是为失败而生的，一个人可以被毁灭，但不能给打败。”这是《老人与海》中主要人物圣地亚哥的一句内心独白，它歌颂了老渔夫非凡的毅力和坚定的信念。Ｅ．《阿Q正传》中的阿Q心中的革命就是“我要什么有什么，欢喜谁就是谁”，同时，阿Q也不许小D革命，由此可见，阿Q是旧民主革命时期的一个落后而不觉悟的农民典型。
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单项选择题

For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never ending flood of words. In (1) a job or advancing in one, the ability to read and comprehend (2) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (3) readers. Most of us develop poor reading (4) at an early age, and never get over them. The main deficiency (5) in the actual stuff of language itself—words. Taken individually, words have (6) meaning until they are strung together into phrases, sentences and paragraphs. (7) , however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to (8) words or passages. Regression, the tendency to look back over (9) you have just read, is a common bad habit in reading. Another habit which (10) down the speed of reading is vocalization—sounding each word either orally or mentally as (11) reads.
To overcome these bad habits, some reading clinics use a device called an (12) , which moves a bar(or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (13) the reader finds comfortable, in order to "stretch" him. The accelerator forces the reader to read fast, (14) word by word reading, regression and subvocalization practically impossible. At first (15) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (16) your comprehension will improve. Many people have found (17) reading skill drastically improved after some training. (18) Charlie Au, a business manager, for instance. His reading rate was a reasonably good 172words a minute (19) the training; now it is an excellent 1,378 words a minute. He is delighted that how he can (20) a lot more reading material in a short period of time.

A．quickly
B．easily
C．roughly
D．decidedly
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