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【简答题】
a. 请基于公式 2 n =2 n-1 +2 n-1 ,设计一个递归算法。当 n 是任意非负整数的时候,该算法能够计算 2 n 的值。 b. 建立该算法所做的加法运算次数的递推关系并求解 c. 为该算法构造一棵递归调用树,然后计算它所做的递归调用次数。
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举一反三
【单选题】When Linda was young, her parents died in an accident. So she was ______ by her aunt.
A.
grown up
B.
brought out
C.
brought up
【单选题】When her parents died, Patricia had to ______ her three sisters.
A.
grow up
B.
care about
C.
bring up
D.
concern about
【多选题】下列关于价值工程的说法中，正确的有（ ）。
A.
价值工程的性质属于一种思想方法和管理技术
B.
价值工程的核心内容是对功能与成本进行系统分析并不断创新
C.
价值工程的目的是最大限度地提高产品功能
D.
价值工程以满足使用者的功能需求为出发点
E.
价值工程通常是产品设计部门独自进行的
【单选题】The girl has been living()since her parents died.
A.
on her own
B.
in a row
C.
in addition
【单选题】Her parents died when she was very young , so she was______by her aunt.
A.
brought up
B.
brought out
C.
grown up
【单选题】Her parents died when she was young so she was ______ by her grandma.
A.
bred
B.
fed up
C.
grown up
D.
brought up
【单选题】The poor little girl was _________young to know ______________ when her parents suddenly died in an accident.
A.
so; what to do
B.
too; what to do
C.
so; how to do
D.
too; how to do
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