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【多选题】
与磁卡相比较,IC卡具有( )的优点。A.
成本低
B.
使用寿命长
C.
防伪能力强
D.
防攻击性强
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】The Internet, unlike other media such as TV or radio, is inherently (本身固有地) a “two-way” medium. A company user can communicate to the rest of the world with ease. It has created a sense of “global com...
【单选题】Of the following, is not among the three major radio and TV networks in America.
A.
the National Broadcasting Company (NB C )
B.
the Public Broadcasting Service (PBS)
C.
the Columbia Broadcasting system (CBS)
D.
the American Broadcasting Company (AB C )
【单选题】The radio company is so big that it has a lot of _____ in foreign countries.
A.
introducers
B.
instructors
C.
conductors
D.
agents
【单选题】Each of the following sentences is provided with four choices. Choose the one that best completes the sentence . ( 1 * 2 0=20 points ) 1. That radio company is so big that it has a lot of _____ in for...
A.
introducers
B.
instructors
C.
conductors
D.
agents
【单选题】“数字图书馆”一词,源于( )年由美国国家科学基金会(NSF)、美国国防部尖端研究项目机构(DARPA)、国家航空与太空总署(NASA)联合发起的数字图书馆创始工程(Digital LibraryInitiative)。
A.
1988
B.
1989
C.
1998
D.
1999
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