瓷盆精致、美观，多直接用于栽培兰花。

柬埔寨的地形特征是（　　）

A．山河相间

B．丘陵为主

C．平原为主

D．山地为主

If you leave the club， you will not be _____   back in . 

A．received

B．admitted

C．turned

D．moved

混凝土强度等级不包括（）。

A.C7.5

B.C10

C.C12.5

D.C15

药品是指

A．指用于预防、治疗、诊断人的疾病，并规定有适应证或者功能主治、用法和用量的物质
B．指用于预防人的疾病，有目的地调节人的生理功能并规定有适应证或者功能主治、用法和用量的物质
C．指用于预防、治疗、诊断人的疾病，有目的地调节人的生理功能并规定有适应证或者功能主治、用法和用量的物质
D．指用于预防、治疗、诊断人的疾病，有目的地调节人的生理功能的物质
E．指用于治疗人的疾病，有目的地调节人的生理功能并规定有适应证或者功能主治、用法和用量的物质

The standardized educational or psychological tests, that are widely used to aid in selecting, assigning, or promoting students, employees, and military personnel have been the target of recent attacks in books, magazines, the daily press, and even in Congress. The target is wrong, for in attacking the tests, critics divert attention from the fault that lies with ill-informed or incompetent users. The tests themselves are merely tools, with characteristics that can be measured with reasonable precision under specified conditions. Whether the results will be valuable, meaningless, or even misleading depends partly upon the tool itself but largely upon the user.

All informed predictions of future performance are based upon some knowledge of relevant past performance. How well the predictions will be validated by later performance depends upon the amount, reliability, and appropriateness of the information used and on the skill and wisdom with which it is interpreted. Anyone who keeps careful score knows that the information available is always incomplete and that the predictions are always subject to error.

Standardized tests should be considered in this context. They provide a quick, objective method of getting some kinds of information about what a person has learned, the skills he has developed, or the kind of person he is. The information so obtained has, qualitatively, the same advantages and shortcomings as other kinds of information. Whether to use tests, other kinds of information, or both in a particular situation depends, therefore, upon the empirical evidence concerning comparative validity, and upon such factors as cost and availability.

In general, the tests work most effectively when the traits or qualities to be measured can be most precisely defined (for example, ability to do well in a particular course of training program) and least effectively when what is to be measured or predicted cannot be well defined (for example, personality or creativity). Properly used, they provide a rapid means of getting comparable information about many people. Sometimes they identify students whose high potential has not been previously recognized, but there are many things they do not do. For example, they don’t compensate for gross social inequality, and thus don’t tell how able an underprivileged younger might have been had he grown up under more favorable circumstances.

The third paragraph is written mainly to state（）

A. the functions of educational tests

B. the dimensions of standardized tests

C. the bases for using standardized tests

D. the mixed results of standardized tests