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举一反三
【单选题】短对话
A.
She felt it was tiring.
B.
She felt it was very nice.
C.
She thought it took less time.
D.
She thought it was expensive.
【单选题】下列有关算法的叙述中错误的是（）
A.
算法中执行的步骤可以无休止的执行下去
B.
算法中的每一步操作必须含义明确
C.
算法中的每一步操作都必须是可执行的
D.
算法必须有输出
【单选题】在下列有关算法的叙述中,错误的是。
A.
通俗的讲，算法就是解决问题的方法和步骤
B.
算法总是在执行了有限步的操作后终止
C.
程序是算法的实现，程序与算法是一一对应的
D.
算法解决的往往是一类问题而不是一个特定的问题
【单选题】What are the two things Americans try to save according to Unit1?
A.
Time and money
B.
Time and freedom
C.
Time and labor