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【多选题】
ISO/IEC RFID 标准中空中接口协议定义多种频段标准的原因,是 由于不同频段的RFID标签:A.
识读速度存在较大差异
B.
识读距离存在较大差异
C.
适用环境存在较大差异
D.
标签和读写器间通信采用无线或有线连接通信
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反馈参考答案：
举一反三
【单选题】Tracy said the work would be done by July,——personally I doubt very much
A.
it
B.
that
C.
when
D.
which
【单选题】－－－ Is Bob still performing? －－－ I’m afraid not. He is said _____ the stage already as he has be
A.
28. --- Is Bob still performing? --- I’m afraid not. He is said _____ the stage already as he has become an official. A．to have left
B.
to leave
C.
to have been left
D.
to be left
【单选题】M: Hello, _____? W: Sorry. There is no one named Tracy. You must have the wrong number.
A.
Who is that
B.
What’s the matter, Tracy
C.
Is that Tracy speaking
D.
What’s your name
【简答题】蒸馏法的原理是什么?其主要方式有哪些?
【单选题】The teacher said “______ you work hard and have a good way, all of you will succeed.” A．IfB．Alth
A.
28. The teacher said “______ you work hard and have a good way, all of you will succeed.” A．If
B.
Although
C.
Though
D.
Before
【单选题】中国共产党领导人民发展__。毫不动摇地巩固和发展公有制经济,毫不动摇地鼓励、支持、引导非公有制经济发展。
A.
中国特色社会主义经济
B.
中国特色社会主义市场经济
C.
社会主义经济
D.
社会主义市场经济
【单选题】从化学的角度研究生物体中各种物质,以下各项不属于化学科学研究的内容是( )
A.
分子结构及其同分异构体
B.
能发生哪些反应，即其主要化学性质
C.
定性、定量分析方法
D.
生物学作用
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