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【判断题】
优生学 (eugenetics) 是以遗传学、医学为基础,研究减少遗传疾病和提高人类素质的科学。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】If the cross-price elasticity of two goods is negative, then those two goods are
A.
substitutes.
B.
complements.
C.
normal goods.
D.
inferior goods.
【单选题】When can two countries gain from trading two goods?
A.
when the first country can only produce the first good and the second country can only produce the second good
B.
when the first country can produce both goods, but can only produce the second good at great cost, and the second country can produce both goods, but can only produce the first good at great cost
C.
when the first country is better at producing both goods and the second country is worse at producing both goods
D.
Two countries could gain from trading two goods under all of the above conditions.
【单选题】If the cross-price elasticity of two goods is negative, then the two goods are
A.
necessities.
B.
complements.
C.
normal goods.
D.
inferior goods.
【简答题】已知y=f(arcsinx)， ，求y'| x=0
【单选题】If the cross-price elasticity of two goods is positive, then those two goods are_________.
A.
inferior goods
B.
normal goods
C.
complements
D.
substitutes
【简答题】设y=(e x +log 3 x)arcsinx，求y'．
【简答题】设y=(1+x 2 )arctanx，求y"．
【简答题】封闭式基金至少每周公告（ ）次资产净值和份额净值
【单选题】If the cross-price elasticity of two goods is negative, then those two goods are_________
A.
normal goods
B.
complements
C.
necessities
D.
inferior goods
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