函数print(“圆周率是:{:.4f}”.format(3.1415926))的执行结果是( )。
A. 圆周率是:3.1415
B. 圆周率是:3.1416
C. 圆周率是:3.141
D. 圆周率是:3.142
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假设i在range(1,5)内取值,则i的可能取值是()。
A. 1
B. 5
C. [1,2,3,4,5]
D. [1,2,3,4]
下面不符合Python语言命名规则的是()。
A. python123
B. python_123
C. _python123
D. 123python
假设有字符串str="Hello-World”,提取子串"Hello”的正确做法是( )。
A. str[1:5]
B. str[1:6]
C. str[0:4]
D. str[0:-6]
Reading Comprehension Need to save time? Simply adjust your daily routine to have more free time for the things you enjoy. Here's how:Be patient. Focus on each task until satisfied before moving on to the next. Be flexible. Observe others or read about a new technique to learn how to perform everything efficiently. Be consistent. Practice the same technique over and over again until it becomes second nature. This will free your mind of even thinking about it. Get your family involved. Kids love creative challenges. Develop their independence by teaching them to accomplish things quickly and efficiently. They may teach you something new. Concentrate on everyday techniques. Determine the quickest way to shop, cook, do dishes, laundry, make your bed, get dressed. Have a place for everything. Designate a place for all items and consistently return them to their hook, shelf, cupboard or closet after each use. If you consistently store your checkbook, keys or umbrella in a designated place, time will not be wasted hunting for them. Purchase a smartphone with email and Internet access. Programming telephone numbers into your phone keeps contacts accessible and eliminates the need to contact a telephone operator time and time again.This article is mainly about .
A. how to get your family involved
B. how to have a place for everything
C. how to make a call
D. how to save time