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【单选题】
在信息加密中，有对称加密方法使用的是( )。A.
公开密钥用于解密，私人密钥用于加密
B.
加密和解密都使用相同的密钥
C.
公开密钥交给对方加密，私人密钥留给自己解密
D.
加密和解密都使用不同的密钥
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举一反三
【判断题】Marketing plan is a written document that acts as a guidebook of marketing objectives for the marketing manager.
A.
正确
B.
错误
【单选题】I don't know_____. [ ]
A.
how to say or do
B.
what to say and to do
C.
what to say or do
D.
how to say and to do
【单选题】The marketing manager has little confidence in talking the board of directors out of the plan about the hunching of a new product.
A.
销售经理太缺乏信心，根本不可能说服董事会停止谈论推出新产品之事。
B.
销售经理在劝董事会放弃投放这项新产品的计划时，表现得毫无信心。
C.
营销部经理想劝董事会放弃投放这项新产品的计划，对此他有一点信心。
D.
营销部经理对劝说董事会放弃投放这项新产品的计划几乎没什么信心。
【单选题】I don’t understand _________ that everything’s fine when it’s not.
A.
how can he say
B.
can he say how
C.
he can say how
D.
how he can say
【单选题】How is the weather in Beijing in the photo?
A.
It's hot.
B.
It's cold.
C.
Doesn't say.
【单选题】— __________ do you go to concerts? — It's hard to say, maybe once a month. [ ]
A.
How much
B.
How long
C.
How often
D.
How soon
【单选题】I don’t understand how he can say that everything is fine ________ it’s so obvious that it’s not.
A.
unless
B.
when
C.
so that
D.
in case
【单选题】I don’t understand how he can say that everything is fine _____ it’s so obvious that it’s not.
A.
unless
B.
in case
C.
so that
D.
when
【单选题】Do you know ________ in English?
A.
how say it
B.
how to say it
C.
how saying it
D.
how to saying it
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