()3.Hewascryingoutonthegroundwhentheambulancearrived.A.introubleB.inorderC.inpainD.indanger
( ) 3. He was crying out on the ground when the ambulance arrived.
A. in trouble B. in order
C. in pain D. in danger
C
S=(1+1/1*2+(2+1/2*3)+(3+1/3*4)+...+(20+1/20*21)S= 2020-04-27 …
就几题,1.计算(x^2+5x+7)/(x+2)-(x^2+7x+11)/(x+3)2.(b^3/ 2020-04-27 …
1*2+2*3=1*(2*3)/3+3*(2*3)/3=2*3*4/31*2+2*3+3*4=2* 2020-05-13 …
上面写不下,我写在下面填符号1.(1)1/2(）0.4()3/10()0.1=1(2)1/2()0 2020-05-13 …
观察下列等式：1^3=1^2,1^3+2^3=3^2,1^3+2^3+3^3=6^2,1^3+2^ 2020-05-15 …
数列{an}各项是1或3,且在第k个1和第k＋1个1之间有2k-1个3,即1,3,1,3,3,3, 2020-05-16 …
1．在5个3之间,填上适当的运算符号,使等式成立． 3 3 3 3 3=0；3 3 3 3 3=1 2020-05-16 …
AfterhalfyearofthecivilwarinLibya（利比亚），thecapital 2020-07-17 …
161.Weshouldhelpherwhensheis.A.introubleB.inatrou 2020-07-18 …
()3.Hewascryingoutonthegroundwhentheambulancearriv 2020-10-31 …