【简答题】
设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则并关系A∪B的定义域dom(A∪B)等于:[填空1]
【简答题】
判断公式“xy(F(x) ùG(y) ?H(x,y))”的类型:[填空1]
【简答题】
设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则对称差关系A⊕B等于:[填空1]
【简答题】
设 A={a,b,c,d}, A上的关系R1={,,},R2={,,,},则合成关系R1○R2等于:[填空1]
【简答题】
设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则交关系A∩B的值域ran(A∩B)等于:[填空1]
【简答题】
Translate the following sentence into ChineseShes excited by the idea of online learning while he considers it meaningless and useless.
【简答题】
Translate the following sentence into English.我现在50多岁了,我发现最大的变化是我比以前更容易累了。
【简答题】
Translate the following sentence into English.他五十多岁了,但看上去比实际年龄年轻。
【简答题】
Directions: Fill in the blanks with the phrases given below. Change the form if necessary.[comprise of; vote for; access to; wake up; be hooked to; in the long run; work at; to ones joy; pay off; be associated with]6. Here, the people[填空1]the electors from states who then choose the president.
【简答题】
1.给下列词加上适当后缀构成名词。admit[填空(1)]accept[填空(2)]adopt[填空(3)]adapt[填空(4)]