【单选题】【消耗次数：1】
睡莲是挺水类花卉。
①
T
②
F
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类 Teacher 和 Student 是类 Person 的子类;
Teacher t;
Student s;
// t and s are all non-null.
if (t instanceof Person ){ s=(Student)t; }
最后一条语句的结果是:（ ）
①
将构造一个Student 对象;
②
表达式是合法的；
③
表达式是错误的；
④
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稀溶液的凝固点Tf与纯溶剂的凝固点T*f比较，Tf〈T*f的条件是（）
①
溶质必需是挥发性的；
②
析出的固相一定是固溶体；
③
析出的固相是纯溶剂；
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析出的固相是纯溶质。
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If you put yourself in the customers shoes, you may realize why the thing isnt selling.划线部分应该翻译成“把鞋送到顾客家里”
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She collected_____________ fishes for the British Museum.
①
different types of
②
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This will be a good____________ for us to exchange experience.
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③
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After Whitneys idea was applied to automobile production, each part____________ had to be made by hand.
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no more
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Between 1990 and 2000, the population of the United States increased____________ 33 million people.
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in
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The power station____________ its supply of electricity day and night.
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misunderstands
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