The ____ of writing a lesson plan is one to give proper consideration to what the teacher is going to do in that lesson.
process
C. principle
D. method

Any lesson we teach naturally divide into different stages of activity and the main stages are: presentation, practice, production, reading, listening and ____.writingC. comprehensionD. revision

A.speaking
B.

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对称密钥加密采用的代表性算法是（ ）

A.DES
B.Hash
C.RSA
D.PKI

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