神经毒剂
参考答案：
作用于昆虫的神经系统，干扰正常的神经传导，引起死亡的药剂。
能保护人体防止感染乙型病毒性肝炎的抗体是______。
Describe with examples the lexical loss which occurred in Old English and Middle English. Do you think the loss of words inevitable What do you think of the process of lexical loss
