题干
— ______ does he get to school?
— He rides his bike.
A：How long
B：How far
C：How
D：When
答案(点此获取答案解析）
C
— ______ does he get to school?
— He rides his bike.
A：How long
B：How far
C：How
D：When
3C(气), 在一定的条件下, 使一定量A和B气体反应, 达到平衡状态时, 具有的性质是: ( )
