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【单选题】
油、气、储油构造中的分布规律是( )。A.
顶部是油，中部是水，底部是气
B.
顶部是气，中部是油，底部是水
C.
顶部是油，中部是气，底部是水
D.
顶部是水，中部是油，底部是气
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【简答题】试述二氢黄酮、异黄酮、花色素水溶液性比黄酮大的原因。
【单选题】Immigration into the U.S. over the past century has caused the percentage of immigrants in the U.S. population to
A.
fall steadily over the entire century.
B.
rise steadily over the entire century.
C.
fall steadily until the 1970s and increase thereafter.
D.
remain relatively constant over the time period.
E.
rise steadily until the 1970s and fall thereafter.
【简答题】The percentage of...is s____________ l_____________ (s___________) than that of... ...的比例比...的比例略高(低)。
【简答题】A．The percentage is high. B．The percentage is low. C．The amount of the population is not so low. D．It is not mentioned in the passage.
【单选题】The general formula used for calculating the net national loss from a trade barrier as a percentage of GDP may fail to account for : a. the production effect of the trade barrier . b. the consumption ...
A.
B.
C.
D.
D
【简答题】A．The percentage is high. B．The percentage is low. C．The amount of the population is not so low. D．It is not mentioned in the passage.
【简答题】走一会儿神 be distracted for a moment
【简答题】The percentage of ... is larger / smaller than that of ... 暑期参加兼职的同学的百分率要略高于往年。
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