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问题 多项选择题

把蒸发器埋入地中，有助于减少不良边界影响，诸如侧壁上的辐射和大气与蒸发器本身之间的热交换。但其不利之处在于（）。

A.导致蒸发器内会聚集更多的杂物，难以消除

B.降水影响

C.临近蒸发器的植被高度影响

D.在蒸发器与土壤之间存在明显的热交换

答案

参考答案：A, C, D

选择题

— Maybe the company won't offer you good pay.

— ________, I won't take the job. [ ]

A. That is to say  

B. What is more

C. In other words  

D. In that case
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单项选择题 案例分析题

The economy of the United states after 1952 was the econnomy of a well-fed,almost fully employed people. Despit occasional alarms, the country escaped any postwar depression and lived in a state of boom. A n economic survey of the year 1955, a typical year of the 1950’s, may be typical as illustrating the rapid economic growth of the decade. The national output was value at 10 percent above that of 1954 (1955 output was estimated at 392 billion dollars). The production of manufacturers was about 40 percent more than it had averaged in the years immediately following World War 2. The country’s business spent about 30billion dollars for new factories and machinery. National income available for spending was almost a third greater than it had been it had been in 1950. Consumers spent about 256 billion dollars; that is about 700 million dollars a day ,or about twenty-five million dollars every hour , all round the clock. Sixty-five million people held jobs and only a little more than two million wanted jobs but could not find them . Only agriculture complained that it was not sharing in the room. To some observers this was an ominous echo of the mid-1920’s . As farmer’s shre of their products declined , marketing costs rose. But there were , among the observers of the national economy, a few who were not as confident as the majority . Those few seemed to fear that the boom could not last and would eventually lead to the oppsite-depression.

The passage states that incom available for spending in the U.S. was greater in 1955 than in 1950 . How much was it ?（）

A.60％

B.50％

C.33％

D.90％
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