如图所示,一个小球用细线拴在P点,并使其在水平面内做匀速圆周运动,测得P点到圆心

题型:填空题

问题:

如图所示,一个小球用细线拴在P点,并使其在水平面内做匀速圆周运动,测得P点到圆心O的距离为h,则它的运动周期为______.

考点:向心力
题型:填空题

新生儿每日生成胆红素量约()

A.10.5mg/kg

B.8.5mg/kg

C.6.5mg/kg

D.4.5mg/kg

E.2.5mg/kg

题型:填空题

总资产周转率反映的是企业总资产的周转速度。在其他条件不变的情况下,会引起总资产周转率指标上升的经济业务是()。

A.用现金偿还负债

B.设备闲置

C.用银行存款购入一台设备

D.用银行存款支付职工工资

E.用现金发放股利

题型:填空题

系统业务处理,所有的交易,当日发生输入错误,按逻辑删除法用()进行帐务处理

A.反交易

B.红字冲正法

C.蓝字反方向冲正法

D.红字或蓝字冲正法

题型:填空题

关于治疗缺铁性贫血,正确的是()

A.目的是使血红蛋白恢复正常

B.维生素B12可增强疗效

C.多饮茶水

D.小剂量开始,血红蛋白正常后再用药2~3个月

E.禁用酸性药物

题型:填空题

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.

第(3)空应选择()

A.good

B.curious

C.poor

D.urgent

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