【多选题】在汇总记账凭证账务处理程序下,下列可以作为登记总分类账依据的有( )。
【单选题】铣削工件时,当零件表面粗糙度要求较高时,应尽可能采用
【单选题】企业信贷危机的产生主要是因为失去了()的信任。
【简答题】朗姆酒根据颜色的不同,主要可以分为哪几类?
【单选题】New ice core samples taken from the centre of the Greenland ice-sheet have given a detailed record of the last 'interglacial(间冰期)' which ran from about 135,000 to 115,000 years ago. The cores, taken f...
A.
The climate in recorded human history has generally remained stable.
B.
The climate from about 135,000 to 115,000 years ago was in a extremely cold state.
C.
The human race has been lucky to have enjoyed the most favorable period of climate for them to build a socio-economic system.
D.
The evidences scientists collected from the ice cores suggest that a civilization can not have arisen in the period from about 135,000 to 115,000.
【单选题】人们研究并利用植物的基因变异(variation)可以培育高产、优质的作物新品种。下列技术能产生基因变异的育种方式是( )
B.
X射线进行大豆人工诱变育种,从诱变后代中选出抗病性强的优良品种。
C.
用杂交和人工染色体加倍技术,成功培育出抗逆能力强的八倍体小黑麦。
D.
把合成 β-胡萝卜素的有关基因转进水稻,育成可预防人类VA缺乏症的转基因水稻。
【单选题】下列微生物与染色法最佳搭配,哪一项是错误的?( )