返回值为字符串的函数是（）。 A: AStr B: BVal C: CLen D: DAsc

If a country’s saving rate declined, then other things the<br/>same, in the long run it would have () A: lower<br/>productivity, but not lower real GDP per person. B: lower<br/>productivity and lower real GDP per person. C: lower<br/>real GDP per person, but not lower productivity D: neither<br/>lower productivity nor lower real GDP per person.

John Steinbeck mainly wrote about lower and lower middle class.

使英文句子中每个单词的首字母大写，其余字母均为小写，可以调用（） A: astr.uppper（） B: astr.lower（） C: astr.capitalize（） D: astr.title（）

Small population may mean ______. A: higher productlvity, but a lower average income B: lower productivity, but a higher average income C: lower productivity and a lower average income D: higher productivity and a higher average income

距离保护功能的“动作”状态信息使用（）数据对象名称建立模型。 A: AStr B: BOp C: CMod D: DTr

Less-for-much-less positioning involves meeting consumers' lower performance or quality requirements at a much lower price.

表示开头是小写的是 A: ^[a-z] B: [^[:lower:]] C: [^a-z] D: ^[[:lower:]]

实现字符的unicode编码方式与ANSI编码方式相互转换的函数是（） A: Astr B: Bstrconv C: Ctrim D: Dmid

Relative to the underlying stock, a call option always has A: a higher beta and a higher standard deviation of return. B: a lower beta and a higher standard deviation of return. C: a higher beta and a lower standard deviation of return. D: a lower beta and a lower standard deviation of return.