什么机构可以发送做市报价？（）
A、做市商
B、尝试做市商
C、有现券买卖权限的其他机构
D、以上都可以
参考答案：A, B
.Though I knew these are words of Latin _____, I didn’t quite know their meanings until I asked my teacher .
A．origin
B．source
C．resource
D．way
把多项式-6y4+5xy3-4x2+x3y按x的降幂排列是______．
