直接购买优良杂交桑苗栽植时间为每年()月下旬至次年1月上旬栽植。
参考答案:12
Which of the following is NOT one of the conditions that must be met for a trade to be considered an arbitrage()
A. There is no risk.
B. There are no commissions.
C. There is no initial investment and there is a guaranteed profit.
经济全球化时代,人才在国际间的流动是大势所趋。