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III.Translation1.重要的事情需要提前计划。2.在学习和娱乐之间要保持平衡。3.你最好控制一下上网聊天的时间,4.时间管理很重要。

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IV.Translation:1.How would you like to pay? Cash or credit card?2.Excuse me, Could you tell me where the toilet is, please?3.I’d like to know how to use the student ID card to borrow books?4.I’d like to return these books.5.Would you like to go for a run?6.How about going for a bike ride?7.Will you eat here or take away?8.I don’t feel like eating in our canteen today?9.Would you like to go skating with me this afternoon?10.I’ve been studying in China for 5 years?

由于测量人员一时疏忽而出现绝对值特大的异常值,属于随机误差。

A. 对
B. 错

测量器具零位不对准时,其测量误差属于系统误差。

A. 对
B. 错

下列对对称密码体制的优点描述错误的是()。

A. 加密和解密的速度都比较快,具有很高的数据吞吐率,硬件加密和解密的处理速度更快。
B. 对称密码体制中使用的密钥相对较短。
C. 密文的长度往往与明文长度相同。
D. 可以有效地实现数字签名。

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