马运良回答：
这根绳子长7/10÷(1-70％)=7/3(米)
【以知向量a=（2,-1,3）；向量b=（-1,4,-2）；向量c=（7,5,m）,若a,b,c三向量共面,则m=?说下思路就可以】
如图所示,点A的坐标(-3,0),以A为圆心,5个单位长度为半径画圆,分别交x轴于点B,C,交y轴于点E,F.求B,C,E,F坐标
怎样连词成句?急.1.the,are,children,to,going,next,swim,saturday,(.)2.where,going,you,go,are,to,summer,for,holiday,(.)
连词成句,1.learning,the,a,are,boys,dance.2.working,Fangfang`s,at,isn`t,mother,now.3.thereare,leaves,on,many,theground,inautumn.4.halfanhour,on,spent,herhomework,she.5.coss,are,going,you,to,Atlantic,the,Ocean?6.language,what,he,speaking,now,
the,are,green,shorts,for,on,in,29yuan,sale连词成句怎the,are,green,shorts,for,on,in,29yuan,sale急.轻巧夺冠上的，老师没讲着，找只好找网络了。
