下面代码的执行结果是()。>>>x = "Happy">>>x * 3
A. 系统报错
B. Happy
C. HappyHappyHappy
D. 'HappyHappyHappy'
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转义字符\n表示换行,光标移动到下一行的起始位置。()
A. 对
B. 错
在Python语言中,x/y的结果为整数。()
A. 对
B. 错
Find out which of the following banks do the things listed below.central banks microcredit banks commercial banks investment banks1 give loans to people who have very limited resources___________.2 advise companies who want to go public_________.3 fix the exchange rate of a national currency _________.4 issue checkbooks, debit cards and credit cards_________.
研究性试验与鉴定性试验有什么区别?分别简述其应用范围。