【单选题】一般来说,无差异曲线离原点越远,其所代表的效用水平
【判断题】在一个平面上会有无数条无差异曲线,其中离原点越远的代表效用水平越大。
【多选题】集成运放的输入级一般采用差动放大电路,其原因是()
【单选题】Whatdoes the interactional view of language see language?
A.
a system of categories based on the communicative needs of the learner
B.
a communicative tool to build up and maintain social relations between people
C.
a linguistic system made up of various subsystems
D.
a linguistic system and a means for doing things
【单选题】下列各项对维生素B 1 的荧光法检测原理,叙述正确的是()
A.
用碱性铁氰化钾将硫胺素氧化为具有深蓝色的荧光硫色素
B.
用酸性铁氰化钾将硫胺素氧化为具有深蓝色的荧光硫色素
C.
用碱性铁氰化钾将硫胺素氧化为具有黄绿色的荧光硫色素
D.
用酸性铁氰化钾将硫胺素氧化为具有黄绿色的荧光硫色素
E.
用碱性铁氰化钾将硫胺素氧化为具有红色的荧光物质
【单选题】集成运放的输入级一般采用差动放大电路,其原因是( )。
【单选题】Whatdoes the functional view of language see language?
A.
a system of categories based on the communicative needs of the learner
B.
a communicative tool to build up and maintain social relations between people
C.
a linguistic system made up of various subsystems
D.
a linguistic system and a means for doing things
【单选题】下列各项对维生素 B1 的荧光法检测原理,哪项叙述是正确的( )
A.
用碱性铁氰化钾将硫胺素氧化为具有深蓝色的荧光硫色素
B.
用酸性铁氰化钾将硫胺素氧化为具有深蓝色的荧光硫色素
C.
用碱性铁氰化钾将硫胺素氧化为具有黄绿色的荧光硫色素
D.
用酸性铁氰化钾将硫胺素氧化为具有黄绿色的荧光硫色素
【判断题】Tell true or false to the following: 1) . Structural view of language stresses the system or rules of language. 2). Functional view of language focuses on the appropriate use of language. 3). Inte...