题干
从方框中选词并用其适当形式填空
wear sing hear watch help |
（1）Tony likes music and he likes ____.
（2）Be quiet! Can you ____ someone is singing a song?
（3）Tom’s aunt always ____ T- shirts.
（4）The family like ____ TV at home together.
（5）Li Lei always ____ others.
答案(点此获取答案解析）
to sing/singing,hear,wears,watching,helps
zC(气)＋wD(气) 的可逆反应中, 经1分钟后A减少a摩/升, B减少a/3摩/升, C增加2a/3摩/升, D增加a摩/升, 则x、y、z、w的比例关系是
