患者，男，38岁，嗜食辛辣，现胃脘痞满，灼热急迫，按之满甚，心中烦热，咽干口燥，渴喜

某反应中反应物与生成物有：和一种未知物质X。

（1）已知在反应中得到电子，则该反应的还原剂是_________。

（2）已知0．2mol在反应中得到1mol电子生成X，则X的化学式为_________。

（3）根据上述反应可推知_________。

a．氧化性：

b．氧化性：

c．还原性：

d．还原性：

（4）将氧化剂和还原剂的化学式及其配平后的系数填入下列方框中，并标出电子转移的方向和数目：

重量为8000N的汽车，在平直公路上匀速前进，若它所受到的阻力是车重的0.05倍，求汽车发动机的牵引力大小。

养阴清肺汤中少佐薄荷的主要意义是 ()

A．疏散肝郁

B．清利头目

C．芳香辟秽

D．散邪利咽

E．清热透疹

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.

第（19）空应选择（）

A．for

B．in

C．after

D．before

减少零件摩擦和磨损；对于摩擦表面进行清洗和冷却；提高活塞环与气缸壁的密封性能，这些是（）。

A.冷却系统

B.润滑系统

C.行走系

D.液压系