交易者先在期货市场买进期货，以便将来在现货市场买进时不至于因价格上涨而给自己造成经济损失的期货交易方式称为空头套期保值。( )
参考答案：错
The police recommended that the ________ in the accident ____________ to the hospital nearby at once.
A．injure; should be sent
B．injuring; send
C．injured; be sent
D．injured; should send
目前认为激光对生物体的作用主要有热效应、电磁效应、光化效应、机械效用。
