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(40)A.ORDER BY 供应商B.ORDER BY 零件号C.GROUP BY 供应商D.GROUP BY 零件号
（40）A．ORDER BY 供应商B．ORDER BY 零件号C．GROUP BY 供应商D．GROUP BY 零件号
A.GROUP BY mnoB.GROUP BY inoC.GROUP BY priceD.GROUP BY MAX(price)
A．GROUP BY mnoB．GROUP BY inoC．GROUP BY priceD．GROUP BY MAX(price)
2(ax+
by
)*(
by
-ax)-(ax+
by
)²-(
by
-ax)²,其中a=-3,x=2分之1
数学
已知ax+
by
=7,ax^2+
by
^2=49,ax^3+
by
^3=133,ax^4+
by
^4=406,试求1995（x+y)+6xy-2分之17（a+b)
数学
E(ax+
by
)=aE(x)+bE(y)V(ax+
by
)=a2V(x)+b2V(y)V(ax+
by
)=a2V(x)+b2V(y)+2abcov(x,y)第二第三个公式,书上都有,请问他们有什么区别吗?我算V(ax+
by
)到底应该算哪个啊?
数学
已知ax＋
by
=7ax^2+
by
^2=49ax^3+
by
^3=133ax^4+
by
^4=406,
数学
一道数学题已知ax+
by
=7,ax^2+
by
^2=49,ax^3+
by
^3=133,ax^4+
by
^4=406.求2008（x+y）+2008xy+（a+b）/21
数学
by
的用法Itmeasured100feetlong[
by
]over10feethighandweighedover30tonnes.句子中
by
是什么意思?有没有类似的例句?为什么要这样用
by
?
英语
1.若aX+bY是形如ax+
by
（x,y是任意整数,a,b是两个不全为零的整数）的树中的最小正数,则（aX+bY）｜ax+
by
.其中x,y是任何整数.2.若a,b是任意二整数,且b不为零,证明：存在两个整数s,t使得a=bs+t,｜t｜≤
数学
,s,t是唯一存在的.当b是
信用证条款availablewith....
by
....standardcharteredbank
by
acceptance中with...
by
...什么意思信用证条款availablewith....
by
....standardcharteredbank
by
accept
其他
bank by accep
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