某种蟑螂喷射一种催泪性毒气――乙 基丙烯 醛.A species of cockroach sprays a substance , ethylacrolein, that is a kind of tear gas.即丙烯醛水合法, 环氧乙烷甲酰化法,生物发酵法.They are acrylaldehyde hydration, ethylene oxide formylation and biological zymolysis m...
The boss tried many ploys to get customers into the store.老板用尽各种伎俩引顾客上门.She tried many ploys to get the boy interested in her.她试过很多伎俩去赢取男孩的青睐.Does this correspond with or contradict his earlier ploys?这与他之前的表现相符或冲突?...
Charles Babbage & Ada Byron ( Lady Lovelace ) worked on programmable mechanical calculating machines.CharlesBabbage 和adaByron发明了可编程的机械式计算器 ( 差分机 ).ADA obviously increases in nearly 90 % cases of hepatocirrhosis.肝硬化时,ADA有...
This paper summarized classification, functions, varieties of colorant and factors affecting coloration of salmon and bulltrout.本文阐述了着色剂的分类及作用 、 着色剂种类的选择及影响鲑鳟鱼着色效果的因素.The results of the research are summarized at the end...