问题
单项选择题
高炉风口小套主要是受到（）而烧坏。
A.炉内的高温气流
B.渣铁与风口小套的直接接触
C.喷吹煤粉的燃烧
答案
参考答案：B
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高炉风口小套主要是受到（）而烧坏。
A.炉内的高温气流
B.渣铁与风口小套的直接接触
C.喷吹煤粉的燃烧
参考答案：B
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| The latest reform in testing is the computerized test.Test questions and answer choices are presented on the __1__.Before the actual test begins, there usually is an instruction showing how to use the computer to __2__ to the questions.Scores are displayed on the screen at the end of the test so that a student has __3__ feedback rather than having to return several days later for __4__. Some computerized tests are "adaptive". This means that a test question is __5__ from a large po  olof items based on how the test taker has responded to the __6__ question.The first question presented is of medium difficulty.If the test taker answers __7__, the next item will be more difficult.If he or she answers __8__, the next question will be easier.The computer __9__ questions by level of difficulty and many other factors.In this way, the questions are "adapted" to find the true skill __10__ of the test taker. Among all the __11__ of computerized testing, there are som  e __12__.No longer can you have a quick look at the __13__ test, answer the easy questions first, and come back later to finish the __14__ ones.Test items are presented one at a time.Once you have confirmed your answer, you cannot go back to __15__ it if, later on, you realize that your answer was wrong. | ||||
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