已知A(1)=1,A(2)=2,A(3)=6,A(4)=8则A(A(1)+A(2))=()。
对任何一个量A,都可以写成A={A}·[A],其中[A]代表量A的单位,{A}代表A在使用单位[A]时的数值。()
She has done her best to keep calm but finds herself trembling with _________ and indecision.
已知int a=12;则:表达式运算后a的值为( )。 a+=a-=a*=a;
一个2行3列的二维数组a,可以视为包含a[0]、a[1]两个元素的一维数组,而a[0]、a[1]又是各包含三个元素的一维数组,其中a[0]的三个元素为a[0][0]、a[0][1]、a[0][2],a[1]的三个元素为a[1][0]、a[1][1]、a[1][2],此时可将a[0]、a[1]视为数组名。
智慧职教: (A ∩ B) ∪ A = A (A ∪ B) ∩ A = A
设 < A,* > 是一个半群,而且对于A中的元索a和b,如果a≠b必有a*b≠b*a,试证明: a)对于A中的每个元索a,有a*a=a。 b)对于A中任何元索a和b,有a*b*a=a. c)对于A中任何元素a,b和c,有a*b*c=a*c.
关于构造函数A()的拷贝构造函数正确的是A.A(A*B);B.A(AB);C.A(A&B);D.A(A);
A= A ; 1mA= μA; 1μA= m A= A
若有定义int a=2;则执行完语句a+=a-=a*a;后,a的值是()。A.0B.4C.8D.-4
关于构造函数A()的拷贝构造函数正确的是A.A(A *B) ;B.A(AB) ;C.A(A&B);D.A(A);
已知A点的三面投影a,a′,a″,其中a反映A到()投影面授距离。
设(A,* )是一个半群,而且对于A中的元素a和b,如果a≠b必有a*b≠b*a,试证明:(1)对于A中每个元素a,有a*a=a;(2)对于A中任何元素a和b,有a*b*a=a;(3)对于A中任何元素a,b和c,有a*b*c=a*c。
The rain was so heavy that the man was wet to the skin; his whole body was______ and trembling.
设< A,+,‧>是一个环,并且对于任意的a∈A.都有a‧a=a,证明: a)对于任意的a∈A.都有a+a=θ,其中θ是加法幺元。 b)< A,+,‧>是可交换环。
设集合A满足以下条件,若a∈A,则1/1-a∈A,且1∈A 1.设集合A满足以下条件,若a∈A,则1/1-a∈A,且1∈A (1)若2∈A,求A中你所知道的其他元素; (2)证明:若a∈A,则1-1/a∈A 2.若集合A={x|x=3n+1,n∈Z},B={x|x=3n+2,n∈Z},M={x|x=6n+3,n∈Z} (1)若m∈M,问是否有a∈A,b∈B,使m=a+b; (2)对于任意a∈A,b∈B,是否一定有a+b=m?并证明你的结论
在粗糙脉孢菌两个连锁基因的分析中,AB × ab杂交产生的7种子囊型如下表,请完善表格信息并进行两个基因的连锁作图(画出连锁图)。 子囊型 ① ② ③ ④ ⑤ ⑥ ⑦ 四分子基因型 排列 A A a a B B b b A A a a b b B B A A a a b B b B A a A a B B b b A a A a B b B b A a A a b B b B A a A a b B B b 子囊数 686 4 150 145 6 4 5 分离时期 四分子类别
One night when Mr. Robinson was asleep,he was woken up by some strange noise outside his house.“Thieves,”he thought. Jumping out of bed,he took his gun and hurried to the bedroom window. The room was not shining and the night was rather dark. But he could see a white shape. It looked like a man in the garden. He pointed his gun at it,fired and went back to bed. Early in the morning,he went down to the garden. His shirt was hanging from a tree. He had washed it the day before and hung it on the tree do dry. It had a hole right through the middle. Mr. Robinson was really frightened out of his life when he saw it and began to tremble(颤抖)。 His neighbour arrived at that moment.“How are you today,Mr,Robinson?”he asked in an anxious voice. “You don’t look well.”
等比数列{},a5+a6=a(a不等于0),a15+a16=b(b不等于0),a25+a26=? 等比数列{an},a5+a6=a(a不等于0),a15+a16=b(b不等于0),a25+a26=?
I used to think education was the most important thing in my life. Recently my attitude has begun to change, although I still hold that it is essential for everyone in the world today. As a top junior student in my college, I was asked to make a speech on how to learn English well. Standing in front of the audience and facing so many freshmen, I was trembling. I didn&39;t remember any word that I had prepared. I ran out of the conference room without finishing my speech, leaving everyone puzzled. I cried that night in my room, feeling that I was a loser. Studying takes so much of my time that I feel unable to really develop myself. I am just storing knowledge; yet fail to communicate with others. I have received many awards in school, but they don&39;t necessarily reflect anything about me. I don&39;t know how to socialize. When I leave school I fear I will be of no use to society.
下边循环执行完后,a为()。 for (a= 1;a< 5; a++ ) a = 2 * a;
设A={a,b,{a,b},c},B={b,{b,c},{a}},求A-B,B-A,A B.设A={a,b,{a,b},c},B={b,{b,c},{a}},求A-B,B-A,A B.
运用布尔代数计算下面表达式的值不是为a的是:() A: a(a+b) B: a+a.b C: a+a D: a+b
There is no cause to tremble ______ his judge.