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濮奖省1563take+the+name+of是什么意思 -
易岚昨19147963502 ______ take the name of 负有…的名声 例句1.In fact, you can't even take the name of the country for granted.事实上,你甚至不能理所当然的采用国名.2.You shall not take the name of the lord the God in vain.你不可妄称主你上帝的名.

濮奖省1563快捷键Crtl+K Alt+F Alt+T 分别是什么 -
易岚昨19147963502 ______ 1. Ctrl+K 关闭除当前和锁定标签外的所有标签2. Alt+F 打开IE窗口的文件标签3. ALT+T 是用来切换消息模式和聊天模式的

濮奖省1563Lao Li's toing won't be of much help. 为什么用of?是be of + 名词的固定搭配吗?应该是Lao Li's going won't be of much help -
易岚昨19147963502 ______[答案] 是固定搭配.be of+抽象名词=be+抽象名词的形容词 如:What he said at the meeting was of great importance.=What he said at the meeting was very important.Lao li's going won't be of much help.= Lao li's go...

濮奖省1563ln(t+1)/t的积分怎么求 -
易岚昨19147963502 ______ ∫ ln(t+1)/t dt =-∫ ln(t+1) d(1/t^2) =-(1/t^2).ln(t+1)+ ∫ dt/[t^2.(t+1) ] =-(1/t^2).ln(t+1) -ln|t| -1/t +ln|t+1| + C let 1/[t^2.(t+1) ]≡ A/t +B/t^2 +C/(t+1) => 1≡ At(t+1) +B(t+1) +Ct^2 t=0, => B=1 t=-1, =>C=1 coef. of t^2 A+C =0 A= -1 1/[t^2.(t+1) ]≡ -1/t +1/t^2 +1/(t+1) ∫ ...

濮奖省1563定义一个求阶乘的函数,然后计算1! - 2!+3! - 4!+5! - 6!+7! - 8!+9!.C语言问题 -
易岚昨19147963502 ______ int fact(int n) { int m = 1; while(n>0) { m*=n; n--; } return m; } int main() { int i, sum=0; for(i=1;i<=9;i++) { if(i%2) sum+=fact(i); else sum-=fact(i); } printf(＂1!容-2!+3!-4!+5!-6!+7!-8!+9!=%d\n＂, sum); }

濮奖省1563 - 2tx^2+x - t <=0在x属于[ - 1,2]上恒成立,求t范围 -
易岚昨19147963502 ______ -2tx²+x-t≤0,即(2x²+1)t≥x,因2x²+1>0,则t≥x/[2x²+1].1、若x=0,则t≥0;2、若x≠0,则分子分母同除以x,得:t≥1/[2x+1/x].为方便起见,设f(x)=2x+1/x,因x∈[-1,2],则f(x)∈(-∞,-2√2]∪[9/2,+∞),从而1/[2x+1/x]∈[-√2/4,0)∪(0,2/9].综合上述,得:t≥2/9.

濮奖省1563已知某物体的温度θ(单位:摄氏度)随时间t(单位:分钟)的变化规律是:θ=m·2 t +2 1 - t (t≥0,且m>0).(1) -
易岚昨19147963502 ______ (1) 经过1分钟,物体的温度为5摄氏度. (2) [ ,+∞) (1)若m=2,则θ=2·2 t +2 1-t =2(2 t + ),当θ=5时,2 t + = ,令2 t =x(x≥1),则x+ = ,即2x 2 -5x+2=0,解得x=2或x= (舍去),此时t=1,所以经过1分钟,物体的温度为5摄氏度.(2)物体的温度总不低于2摄氏度,即θ≥2恒成立.亦即m·2 t + ≥2恒成立.亦即m≥2( - )恒成立.令 =a,则0∴m≥2(a-a 2 ),由于a-a 2 ≤ ,∴m≥ .因此当物体的温度总不低于2摄氏度时,m的取值范围是[ ,+∞).

濮奖省1563初中外研版动词+Doing 或To do 的短语和用法 -
易岚昨19147963502 ______ 1.remember to do sth.记住要做某事 remember doing sth.记住曾做过某事2.forget to do sth.忘记要做某事 forget doing sth.忘记曾做过某事3.try to do sth.设法要做某事 try doing sth.做某事试试看有何效果4.mean to do sth.打算做某事 mean doing sth....

濮奖省1563在oxy平面内有一个运动的质点,其运动函数为r=3ti+10t的二次方j(SI),求 -
易岚昨19147963502 ______ 1、r=3ti+10t^2j v=r'=3i+20tj 2、v的方向为(3i+20tj)/√(9+400t^2) a=v'=20j 切向加速度大小为:(20j)·(3i+20tj)/√(9+400t^2)=400t/√(9+400t^2) 法向加速度大小为:(20j)·(-20ti+3j)/√(9+400t^2)=60/√(9+400t^2) 3、x=3t y=10t^2 轨迹为y=10x^2/9 是一条过原点的抛物线.