人类历史上三个主要动物驯化中心分别是()。
题目详情
A、非洲B、西亚C、中国和东南亚D、美洲
题目答案
题目解析⬇️小程序搜题更方便
[db:答案解析]
推荐题目
In condensation polymerization, two monomers, dimers, trimers, tetramers, or oligomers, can react with each other at any time.()
人类把野生动物转化为家畜主要经历了两个阶段,包括()。
品种应具备的条件包括()。
Common polymers, such as PE, PP, PVC, PSt, nylon, and PET have linear structures.()
按改良程度,将品种分为三类,包括()。
学前知识系统化教学中,幼儿园活动的类型主要分为日常生活活动和()。
When the methyl group and H atom are located on opposite sides of the double bond, the polymer is a cis-isomer.()
在课程运作的过程中进行的,目的是要提供证据以便确定如何修订课程计划的评价是()。
Nowadays, all of the polymers are synthesized artificially.()
我国约有700个畜禽品种,约占世界的1/6。()
Silicon rubber also has many reactive points in the molecular chains, which is same as polyisoprene and polybutadiene.()
Number average molecular weights provide us some information related to ().
数量性状基因座即QLT。()
Additives are external substances purposely added to change properties of polymers or resins.()
微效多基因假说的实质是()。