一、选择题:本大题共12小题,每小题5分,共60分,在每小题给出的四个备选项中,只有一项是符合题目要求的.1.已知集合M={0,1,2},N={x|x=2a,a∈M},则集合M∩N=()(A){0}.(B){0,1}.(C){1,2}.(D){0,2}.2.设f,g都是由A到A的映射,其对应法则如下表(从上到下):表1映射f的对应法则原象1 2 First, the multiple-choice questions: The title of a total of 12 small questions, each small topic 5 points, a total of 60 points, in each question given four options, only one is in line with the requirements of the title. Known collection M={0,1,2},N={x|x=2a,a∈M}, then the set M∩N=()(A){0}.(B){0,1}.(C {1,2}.(D){0,2}.2. Let f,g be the mapping from A to A, and the corresponding rules are listed in the following table (from top to bottom): Table 1 Corresponding Rule of Mapping f The original image 1 2