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【单选题】
由下位子房和花托一起形成的果实是A.
桃
B.
苹果
C.
西红柿
D.
柑橘
E.
茄子
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皮皮学刷刷变学霸
举一反三
【简答题】零增长模型实际上是不变增长模型的一个特例。假定增长率g等于零，股息将永远按固定数量支付，这时，不变增长模型就是零增长模型。 （ ）
【单选题】Some languages，________ Russian and German，are not easy to learn.
A.
for example
B.
such as
C.
as
D.
that is
【单选题】-How come your father can read books in German? -Well, he _______ on a project with some German engineers for 3 years when he was young. [ ]
A.
worked
B.
has worked
C.
had worked
D.
would work
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