多项选择题
Bringing pragmatics into the L2 classroom is associated with two main goals:
A、the level of grammatical competence;
B、the development of pragmatic awareness;
C、the communicative abilites;
D、practicing pragmatic abilities.
Bringing pragmatics into the L2 classroom is associated with two main goals:
A、the level of grammatical competence;
B、the development of pragmatic awareness;
C、the communicative abilites;
D、practicing pragmatic abilities.
转动，设在啮合过程中两飞轮不再受其他力矩作用。当两轮连在一起后，共同的角速度为w。若A轮的转动惯量为
，则B轮的转动惯量为
=（）
