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【多选题】
下面有关数字信封的说法哪些是正确的（ ）。A.
数字信封可以保障发送的信息不被泄露
B.
数字信封中会话密钥对发送接收是一致的
C.
数字信封采用非对称加密算法对传输的文件进行加密
D.
数字信封要使用发送方的公钥
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举一反三
【简答题】简述 植物 年轮形成的原因,指出什么是早材 和 晚材?
【单选题】下列哪项不是进行活动分析的目的
A.
为治疗师提供全面理解活动行为的方法
B.
了解从事活动所需要的设备、用具和材料、花贵、时间、空间可及人员
C.
通过适应和改造设备、环境及简化活动，来确定转换活动的方式
D.
在选择可满足特殊需要的活动时，练习解决问题的技能
E.
为了达到治疗目标
【单选题】The _____ is a traditional part of the Christmas festivities.
A.
giving presents
B.
giving of presents
C.
presents to give
D.
presents to giving
【简答题】What
did Gates value most in high school and college? (2.0分)A. Visiting
the library. B. Writing
software. C. Developing
broad interests and team spirit. D. Asking
questions.
【简答题】年轮形成的原因,指出什么是早材?什么是晚材?
【判断题】The 24 Solar Terms are part of the traditional Chinese calendar. It was originated along the Yellow River even before the Han Dynasty.
A.
正确
B.
错误
【单选题】Which of the following is NOT a part of the traditional American spirit?
A.
Failure is regarded as a stepping stone rather than a stumbling stone.
B.
One's destiny is in the charge of oneself, but not at the mercy of others.
C.
The next generation will have a more prosperous future.
D.
Americans are more willing to do experiments than the European counterparts.
【单选题】What was a part of the traditional Igbo culture?
A.
a father made important decisions for his children
B.
children did not disobey their parents
C.
marriages were arranged
D.
young men and women decided whom to marry
【多选题】进行活动分析的目的
A.
为治疗师提供全面理解活动行为的方法
B.
了解从事活动所需要的设备、用具和材料、花费、时间、空间及人员
C.
通过适应和改造设备、环境及简化活动，来确定转换活动的方式
D.
在选择可以满足特殊需要的活动时，练习解决问题的技能
E.
为了达到治疗目标
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