早教吧作业答案频道 -->英语-->
Ihavebeenmorethansixyearsoldwhentheaccidenthappened.A.shouldn'tB.couldn'tC.mustn'tD.needn't
题目详情
I ________ have been more than six years old when the accident happened.
A.shouldn't
B.couldn't
C.mustn't
D.needn't
A.shouldn't
B.couldn't
C.mustn't
D.needn't
▼优质解答
答案和解析
答案B
shouldn't have done不应该做而实际上做了;couldn't have been不可能是……;needn't have done没必要做某事而做了;此外无mustn't have done结构,结合句意可知B项正确.
shouldn't have done不应该做而实际上做了;couldn't have been不可能是……;needn't have done没必要做某事而做了;此外无mustn't have done结构,结合句意可知B项正确.
看了 Ihavebeenmoret...的网友还看了以下:
求极限1:lim[(n-3)/(2n-1)]∧2.要解法 2:因为:lim[1+(1/n)]∧n= 2020-05-16 …
为什么当m→0时,(m+1)^(1/m)→e,怎么证明?令n=1/m则(m+1)^(1/m)=(1 2020-05-21 …
数列极限:设{an}为数列,a为定数.若对任给的正数E,总存在正整数N,使得当n>N时有/an-a 2020-06-05 …
已知函数f(x)=e^x-ln(x+1)(1)求函数f(x)的单调区间(2)证明e+e^1/2+e 2020-06-06 …
((1+1/n)^(n^2))/e^nn趋向∞为什么分母不能直接化为e^n,结果为什么不是1 2020-06-12 …
若实数m.n满足m>0,n>0求证:n^n.e^m>=m^n.e^n怎么证?(e为自然对数底数) 2020-06-22 …
与毛泽东的诗句“坐地日行八万里,巡天遥看一千河”最接近的地点是()A.北京(40°N,116°E) 2020-07-10 …
设函数f1(x)=112x4+aex(其中a是非零常数,e是自然对数的底),记fn(x)=fn-1 2020-08-02 …
用e,f,g三个不同字母组成一个含n+1(n∈N*)个字母的字符串,要求由字母e开始,相邻两个字母不 2020-11-07 …
用C++求不超过30000E数列的最大E数的值/*数列:E(1)=E(2)=1E(n)=(n-1)* 2020-11-20 …