题目内容
A mistake refers to a performance ____that is either a random guess or a “slip oftongue”, and it is a ____performance to a known system.
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Classroom management is an important factor that contributes to the efficiency of the teaching and learning activities.
导游与游客交谈，应善于倾听，给别人以说话的机会。
If the student cannot self-correct, it means there is a lack of competence and the teacher can help with the correction or may ask other students to help correct it.
握手力度以不握疼对方的手为最大限度。在一般情况下，握手不必用力，握一下即可。
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