已知x={1：1，2：2}，那么执行语句x[3]=3之后，表达式sorted（x.items（））的值为（）。

已知x = {'b':1, 'a':2},那么执行语句x.update({‘a’:3, ‘d’:4})之后,表达式sorted(x.items())的值为____。

已知x = {1:1, 2:2}，那么执行语句x.update({2:3, 3:3})之后，表达式sorted(x.items())的值为____________________。

已知字典x = {i:str(i+3) for i in range(3)} , 那么表达式 sum(item[0] for item in x.items()) 的值为___()______。 A: 3 B: 5 C: 10 D: 12

中国大学MOOC: x=4;y=6;z=2;items=x+y+z,cost=x*25+y*22+z*99,average_cost=cost/items 运行由这6个语句构成的MATLAB程序，会在命令窗口显示哪些变量的值？

Match the items in Column A with the items in Column B.

If A = 10100110, B is the mask, and C = 10101111, which of the following items is correct so that C = A X B? Note that X is a logic operator. A: B= 00001111, X= OR B: B= 00001101, X= XOR C: B= 01011000, X= XOR D: B= 11111111, X = AND

what do the following items belong to banned items?

If A = (10100110)2, B is the mask, and C = (11111110)2, which of the following items is correct so that C = A X B? Note that X is a logic operator. A: B=11111100, X =AND B: B=01100000, X=XOR C: B=00000111, X=AND D: B=11111000, X=OR

Unit 5 单元测试 Match the items in Column A with the items in Column B.