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参数：id=IC9999,ag1908,a1909,CF1909&column=mc,ccl,jj
说明：取IC9999,ag1908,a1909,CF1909这4个品种的现价，加4个列：涨幅、名称、持仓量、分时均价
结果：
代码,涨幅,价格,名称,持仓量,分时均价
IC9999,1.081,4843,中证主连,64746,966022.19
ag1908,0.083,3628,沪银1908,256,3628
a1909,0.677,3421,豆一1909,138496,34186.933
CF1909,0.230,13085,棉花1909,421634,65350