某一粒度范围内的颗粒的质量分数随粒度的变化关系称为颗粒群的粒度分布。
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地陪在游客面前的首次亮相是在()时。
A. 寻找游客
B. 沿途导游
C. 清点人数
D. 接站服务
地陪通常应提前()分钟抵达迎接游客的机场(车站、码头)，并与司机商定旅
A. 10
B. 15
C. 20
D. 30
Substitution drills that involve changes in forms are more effective than those in which students simply replace the target part with another word.
A. 对
B. 错
Which of the following is true about the ways of presenting grammar in the classroom?
A. In the inductive method, sometimes comparisons are made between the native language and the target language.
B. In the deductive method, the teacher provides learners with authentic langauge data.
C. The guided discovery method is similar to the inductive method in that the students are induced to discover rules by themselves.
D. The inductive method is ofen criticized because little attention is paid to meaning.
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