可转换债券，在行使转换权后，改变了资本结构，还可新增一笔股权资本金。（）
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。
感染过程中病原体与免疫应答的作用。
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"]
自我意识
