【单选题】
4．下列有关疾病条件的叙述哪项是错误的：
①
A、是影响疾病发生发展的因素
②
B、某些条件可以延缓疾病的发生
③
C、某些条件可以促进疾病的发生
④
D、是疾病发生必不可少的因素
⑤
E、某些条件也可以称为诱因
【单选题】
4．关于酶活性中心的叙述，哪项不正确？
①
A．酶与底物接触只限于酶分子上与酶活性密切有关的较小区域
②
B．必需基团可位于活性中心之内，也可位于活性中心之外
③
C．一般来说，总是多肽链的一级结构上相邻的几个氨基酸的残基相对集中，形成酶的活性中心
④
D．酶原激活实际上就是完整的活性中心形成的过程
⑤
E．当底物分子与酶分子相接触时，可引起酶活性中心的构象改变
【单选题】
What does the functional view of language see language?
①
A system of categories based on the communicative needs of the learner
②
A communicative tool to build up and maintain social relations between people
③
A linguistic system made up of various subsystems
④
A a linguistic system and a means for doing things.
【单选题】
What does the structural view of language see language?
①
A system of categories based on the communicative needs of the learner
②
A communicative tool to build up and maintain social relations between people
③
A linguistic system made up of various subsystems
④
A linguistic system and a means for doing things.
【单选题】
What does the interactional view of language see language?
①
A system of categories based on the communicative needs of the learner
②
A communicative tool to build up and maintain social relations between people
③
A linguistic system made up of various subsystems
④
A linguistic system and a means for doing things.