依企业所得税法规定，纳税人2000年的亏损，需在下一年度税前弥补的，需报同级税务机关

背部手术后拆线时间是（）。

A.4天 

B.5～6天 

C.7～9天 

D.10～12天 

E.14天

审核员审核受审核方的监视和测量设备校准情况时，抽样的样本应本源于（）

A、所有的监视和测量设备

B、用于证实产品符合确定要求的所有监视和测量设备

C、正在使用的监视和测量设备

D、所有暂时不用的监视和测量设备

设备租赁与购置的经济比选通常采用的方法是( )。

A．净现值法与年值法
B．年成本法与年值法
C．净现值法与年费用法
D．净年值法与年费用法

两个平面共同的水平性怎么检查？

A weather map is an important tool for geographers. A succession of three of four maps presents a continuous picture of weather changes. Weather forecasts are able to determine the speed of air masses and fronts; to determine whether an individual pressure area is deepening or becoming shallow and whether a front is increasing or decreasing in intensity. They are also able to determine whether an air mass is retaining its original characteristics or taking on those of the surface over which it is moving. Thus, a most significant function of the map is to reveal a synoptic picture of conditions in the atmosphere at a given time.

All students of geography should be able to interpret a weather map accurately. Weather maps contain an enormous amount of information about weather conditions existing at the time of observation over a large geographical area. They reveal in a few minutes what otherwise would take hours to describe. The United States weather Bureau issues information about approaching storms, floods, frosts, droughts, and all climatic conditions in general. Twice a month it issues a 30-day "outlook" which is a rough guide to weather conditions likely to occur over broad areas of the United States. These 30-day outlooks are based upon an analysis of the upper air levels with often set the stage for the development of air masses, fronts, and storms.

Considerable effort is being exerted today to achieve more accurate weather predictions. With the use of electronic instruments and earth satellites, enormous gains have taken place recently in identifying and tracking storms over regions which have but few meteorological stations. Extensive experiments are also in progress for weather modification studies. But the limitations of weather modification have prevented meteorological results except in the seeding of super-cooled, upslope mountainous winds which have produced additional orographical precipitation on the windward side of mountain ranges. Nevertheless, they have provided a clearer understanding of the fundamentals of weather elements.

A weather map is synoptic because it（）

A. summarizes a great deal of information

B. can be interpreted accurately

C. appears daily

D. shows changing fronts