is+a+directory

仇奋实3995It is +adj for to do 的用法和例句 -
湛兴询13345501518 ______ it is adj for( of) sb to do sth it is important for us to study enlglish it is nice of you to pass me a book 介词会根据形容词主观还是客观不同而不同,如需进一步指导,请追问

仇奋实3995逻辑函数表达式F1=B'+A'B'+A'C'+ABC -
湛兴询13345501518 ______ 化简逻辑函数F1=B'+A'B'+A'C'+ABC F1=B'+A'B'+A'C'+ABC= B'(1+A')+A'C'+ABC= B'+A'C'+ABC = B'+ABC +A'C'= B'+AC +A'C'

仇奋实3995逻辑函数化简 Y=AC+A'D+C'D+A'B+BC -
湛兴询13345501518 ______ Y=AC+(A'+C')D+A'B+BC =AC+(AC)'D+A'B+BC =AC+D+A'B+BC(A+A') =(AC+ABC)+D+(A'B+A'BC) =AC+D+A'B

仇奋实3995it is+形容词+(for sb)+to do.....【组三个这种句子,怎么组】 -
湛兴询13345501518 ______ 1.It's cool to wear this sungasses 2.It's nice to wear this dress 3.It's hard to finish this work

仇奋实3995用It is+adj.+to do sth.造句 -
湛兴询13345501518 ______ It is easy for me to answer this question.It is good for people to go for a walk after supper.It is nice for her to help the granny.It is important to learn English well!

仇奋实3995It is +adj+for sb to do sth与It is+adj+of sb to do
湛兴询13345501518 ______ 若形容词是描述不定式行为者的性格、品质的,如kind,good,nice,right,wrong,clever,careless,polite,foolish等,用of sb.. It's very kind of you to help me. 你能帮我,真好. It's clever of you to work out the maths problem. 你真聪明,解出了这道...

仇奋实39951.若关于x的一元二次方程x2+ax+1≥0对于一切实数x都成立,求实数a的取值范围.(这时候的△是怎样的?) -
湛兴询13345501518 ______ 1、x的一元二次方程x2+ax+1≥0, 你看成函数y=x²+ax+1,它的图象是开口向上,y=x²+ax+1≥0,要恒成立就是它的最低点大于等于0,即函数与X轴最多只能有一个交点,意思也就是x²+ax+1=0最多只能有一个实根(可以没有 实根,即图象...

仇奋实3995mysql中SELECT a+0 FROM table是什么意思? -
湛兴询13345501518 ______ mysql会根据上下文自动转换类型 这一句的意思就是,将被本来是字符类型的字段值以数值型返回 如果字段存放的值为数值字符,则会转换为数值型返回 如果字段存放的值为字母或者汉字,则直接返回0

仇奋实3995a^5+a+1因式分解 -
湛兴询13345501518 ______[答案] a^5+a+1 =a^5-a^2+a^2+a+1 =a^2(a^3-1)+a^2+a+1 =a^2(a-1)(a^2+a+1)+a^2+a+1 =(a^3-a^2+1)(a^2+a+1)

仇奋实3995y=AB'+ C +A'C'D +BC'D怎样化解数字电路,急急急 -
湛兴询13345501518 ______ 化简数字电路可以用公式法,也可以用卡诺图法 y=AB'+ C +A'C'D +BC'D=AB'+ C +C'(A'D +BD)=AB'+ C +A'D +BD= AB'+ C +D(A' +B)=AB'+ C +(AB')'D=AB'+ C +D 注:这里就是利用了公式 A+A'B=A+B 两次.