中毒
品种的引进只要对本地区有利就可以，不需要进行全面的生态学评估。
教育的平等性原则可主要从以下哪些方面来理解（） ["实事求是原则","扶持特殊地区和人群教育原则","受教育机会平等原则","尊师重教原则"]
The exhaust ports of a diesel engine using the cross-flow scavenging method are opened and closed by the （） ["reciprocating motion of exhaust valves","rotary motion of the camshaft","reciprocating motion of the piston","developed differential"]
食人鱼是脂鲤目脂鲤科锯脂鲤属鱼类的统称，是南美洲食肉的海水鱼。
远期汇率
