期货交易的金字塔式买入卖出方法认为，若建仓后市场行情与预料相同并已使投机者盈利，则可以（ ）
A．平仓
B．持仓
C．增加持仓
D．减少持仓
参考答案：C
If people _____ the importance of living a low-carbon life earlier, there _____ so many environmental
problems now. [ ]
A. realized; wouldn't be
B. had realized; wouldn't be
C. had realized; wouldn't have been
D. realized; wouldn't have been
最先提出“不伤害原则”的西方医学家是（）。
A.希波克拉底
B.盖伦
C.维萨里
D.白求恩
E.桑德斯
