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【单选题】
为研究所在城市某区室内污染情况,某学者选择了若干户人家,检测室内二氧化碳、二氧化硫、甲醛和氡等指标。结果发现,某一栋大楼内居民室内氡明显超过卫生标准,且随着楼层的增高,含量有所下降。由此判断:氡可能来源于A.
燃料燃烧
B.
地基土壤
C.
建筑材料
D.
吸烟
E.
人的呼出气
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【简答题】下列所示四只硅二极管中,处于导通状态的二极管是A. B. C. D.
【多选题】Which of the following statements is true?
A.
Hindus won't eat any meat.
B.
Muslims are usually vegetarians.
C.
Muslims won't eat pork.
D.
Hindus won't eat beef.
【单选题】Which of the following is not published by UKHO? _______
A.
Admiralty Lights and Fog Signals.
B.
Admiralty List of Radio Signals.
C.
Admiralty Tide Tables.
D.
Nautical Almanac.
【简答题】下列所示四只硅二极管中,处于导通状态的二极管是
【单选题】Which of the following statements is FALSE?
A.
When we relax the assumption of a constant debt-equity ratio, the FTE method is relatively straightforward to use and is therefore the preferred method with alternative leverage policies.
B.
When debt levels are set according to a fixed schedule, we can discount the predetermined interest tax shields using the debt cost of capital, rD .
C.
With a constant interest coverage policy, the value of the interest tax shield is proportional to the project's unlevered value.
D.
When the firm keeps its interest payments to a target fraction of its FCF, we say it has a constant interest coverage ratio.
【单选题】Which of the following is true?
A.
The doctor advised him to take exercise.
B.
He tried to eat less, but his wife wanted him to eat more.
C.
He tried to lose weight, but failed in the end.
D.
He drove to a village far away from the city.
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