-Isthereaholidayrecently?-Therebe.Ithasbeeninformedthatwewillcontinuetostudyforanotherthreeweeks.()A.won'tB.mustn'tC.maynotD.can't
-Is there a holiday recently?
-There_____ be.It has been informed that we will continue to study for another three weeks.( )
A. won't
B. mustn't
C. may not
D. can't
怎样判断是不是复合函数已知y=f(u)=u^1/2,u=d(x)=a-x^2.考察a=1,a=-1 2020-04-27 …
设函数f(u)具有二阶导数,而z=f((e^x)*sin(y))满足方程d^2(z)/d^2(x^ 2020-05-16 …
椭圆方程式的题椭圆方程x^2/a^2+y^2/b^2=t怎么用y=f(u),x=f(u)表示如果椭 2020-05-16 …
用这些英文字母拼词这些英文字母打乱了顺序.一个题目一个词.第一题:r,c,t,a,e,s,r第二题 2020-05-16 …
给下列划线字选择正确的读音画上“△”。咳嗽(sòusou)击缶(fǔfǒu)都督(dūdōu)警惕 2020-07-02 …
不确定度传递公式.f=L^2-d^2/4LL±u=480mm±2mm求f±u=?大一去当实验室志愿 2020-07-21 …
函数的运算:已知函数f(x)的定义域为R,对任意实数u,v满足f(u+v)=f(u)+f(v),且 2020-07-27 …
设f(x,y)连续,且f(x,y)=xy+fff(u,v)dudv其中D是由y=0y=x平方x=1所 2020-11-07 …
拼读音节。f&f*f(f)j-+→j*t&t*t(t)q-[→q(d1d2d3d4x-→x&p9p0 2020-12-04 …
四成四魔方,最后一步要把两个角换掉,不要什么u.l.r.f.b不要说这是国际公式,因为这个根本... 2021-01-07 …