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【单选题】
正常人随年龄增长其体液总量的变化是：A.
逐渐增加
B.
逐渐减
C.
成年前多，而后减少并保持恒定
D.
成年前少，而后逐渐增加
E.
不受影响
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【单选题】Assume the price of gasoline is $2.40 per gallon, and the equilibrium quantity of gasoline is 12 million gallons per day with no tax on gasoline. Starting from this initial situation, which of the fol...
A.
A 10 percent increase in the price of gasoline reduces the quantity of gasoline demanded by 2 percent and it increases the quantity of gasoline supplied by 5 percent; and the tax on gasoline amounts to $0.40 per gallon.
B.
A 10 percent increase in the price of gasoline reduces the quantity of gasoline demanded by 2 percent and it increases the quantity of gasoline supplied by 7 percent; and the tax on gasoline amounts to $0.40 per gallon.
C.
A 10 percent increase in the price of gasoline reduces the quantity of gasoline demanded by 1 percent and it increases the quantity of gasoline supplied by 8 percent; and the tax on gasoline amounts to $0.35 per gallon.
D.
There is insufficient information to make this determination.
【简答题】遗传信息需要通过转录 和 得到表达。