BIOSIS Previews《美国生物学文献数据... ... 一、数据库简介BIOSIS Previews数据库(简称BP)是由美国生物科学信息服务社(BIOSIS)生产的世界上最大的有关生命科学的文摘索引数据库。该数据库对应的出版物是《生物学文摘》(Biological Abstracts,1969至今), 《生物学文摘-综述、报告、会议》(Biological Abstracts/RRM ,1980 ③逻辑算符AND,OR,NOT,SAME (3)检索字段(search fields) ...
基于30个网页-相关网页
...用户指定一对字段名和关头词;也撑持高级检索:用户可以指定三对字段名和关头词、三对字段名和关头词间的逻辑关系(AND OR NOT)、检索结不美观条目的排序原则(默认、按日期排序和按相关度排序)和每页显示若干好多条检索结不美观。
基于26个网页-相关网页
AND-OR-NOT 与或非运算 ; 与或非门
and or not gate 与或非门
AND-OR-NOT gate 与或非门 ; 及或非门
not and or xor 逻辑运算符 ; 运算符
not and or 序是 ; 逻辑运算符 ; 算术运算 ; 逻辑操作符
and not or 逻辑运算符
not or and 逻辑运算符 ; 逻辑运算
OR AND NOT 或与非门
AND D OR NOT gate 与或非门
And it's getting the logical words right, if then and or not, is hugely important. Have you gotten one?
逻辑词对了,如果,那么,和,或者,不,是很重要的,你有吗?
The curtains are for purely decorative purposes and do not open or close.
那些窗帘纯粹用于装饰目的,不能开合。
Like it or not, our families shape our lives and make us what we are.
不管喜欢与否,我们的家庭塑造我们的生活并铸就我们的个性。
Acetaminophen,also called paracetamol, is found in Tylenol, Excedrin and other products that do not require a doctor's order or prescription.
VOA: special.2009.07.21
That is to say, it's not this and it's not this, or it "emerges" as that which is not this, not this.
也就是说,它不是这个,不是这个,或者,它作为不是这个,不是这个而出现。
and yet are not the things that we covet or wish to banish, We recognize in ourselves the capacity for disinterestedness.
而且我们既不会垂涎于它也不会产生厌恶之感,我们承认我们有能力做到绝对公正。
应用推荐