【单选题】3-2.完成一项装修工程,请木工需付工资每人200元,请瓦工需付工资每人180元,现有工人工资预算5000元,设木工x人,瓦工y人,请工人的一个约束条件是( ) A.200x+180y=5000 B.200x+180y≤5000 C.200x+180y≥5000 D.180x+200y≤5000
【单选题】Jakobson established a well-known framework of language functions based on the six key elements of communication, among them, Metalingual function means____.
A.
to convey message and information
B.
to indulge in language for its own sake
C.
to establish communion with others
D.
to clear up intentions and meanings
【单选题】370开局阶段奠定谈判成功基础的关键是 ()
【单选题】Jakobson established a well-known framework of language functions based on the six key elements of communication, among them, Conative function means____.
A.
to convey message and information
B.
to indulge in language for its own sake
C.
to express attitudes, feelings and emotions
D.
to persuade and influence others through commands and requests
【单选题】关于基因工程,下列哪项叙述有误()
E.
操作时常将目的基因和载体用不同的内切酶切割以获得粘性末端