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【简答题】
ISO7498-2确定了五大类安全服务，即鉴别、()、数据保密性、数据完整性和不可否认。同时，ISO7498-2也确定了八类安全机制，即加密机制、数据签名机制、访问控制机制、数据完整性机制、()、业务填充机制、路由控制机制和公证机制。
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【简答题】阅读理解。 Princeton University Location The University is in Princeton, New Jersey. It is an hour's train ride south of New York City and an hour's train ride north of Philadelphia. Students There are 4,6...
【单选题】A straight wire 20 cm long, carrying a current of 4 A, is in a uniform magnetic field of 0.6 T. What is the force on the wire when it is at an angle of 30° with respect to the field?
A.
0.2 N
B.
0.3 N
C.
0.4 N
D.
0.5 N
【单选题】Why does the author put 'neutron star' in quotation marks?
A.
It is a special term of astronomy.
B.
It is an invented term.
C.
He is quoting an authority.
D.
He is using the term ironically.
【简答题】观看视频后,请把新媒体平台风格营造的具体方法做个总结,写成如下形式 方法1、 方法2、 方法3、 ...
【单选题】—This wall of air is an effective answer to the problem and it ________ work. —But it is a question to put such a wall of air around the statue. [ ]
A.
may
B.
must
C.
should
D.
could
【单选题】Whe the amount is entered on the ( ) side of an T account, it is a credit; and the account is said to be credited.
A.
left
B.
right
C.
left or right
D.
none of the above
【简答题】A．It is a big problem in the management of the city. B．It is a push needed to develop the city. C．It is a cause of disintegration of the city's social structure. D．It is an obstacle to the development...
【单选题】This is an ideal site for a university______ it is far from the downtown area.
A.
provided that
B.
now that
C.
so that
D.
in that
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