听力原文:What is intercultural communication according to the speaker?
(31)
A.Language elements.
B.Cultural differences.
C.Something happens when people from another culture want to communicate.
D.Practical problems in communications between different cultures.
The word carbon(Para. 2, Line 3)stands for" ______".
A.intelligent robots
B.a chemical element
C.an organic substance
D.human beings
A.salt is all inerrant flavor enhancer and preservative
B.salt is an essential nutrient for the body
C.the businessmen worry they will get less profit
D.there are some other important factors for high blood pressure
A.增强子决定基因表达的组织特异性
B.增强子是远离启动子的顺式作用元件
C.增强子作用无方向性
D.增强子在基因的上游或下游均对基因的转录有增强作用
E.增强子只在个别真核生物中存在,无普遍性
增强子与启动子的不同在于()。
A.增强子与转录启动无任何关系
B.增强子包含数个功能单元(module elements),而启动子则只有一个单元
C.启动子可位于起始点的上游,而增强子只能位于起始点的下游
D.增强子可能位于上游和下游,但不靠近起始点
A.增强子可远距离发挥作用
B.与增强子方向无关
C.可通过启动子提高同一条链上的靶基因的转录效率
D.没有基因的专一性,可在不同的基因组合上表现增强效应