题干
–David, is that _____ English teacher?
--Yes, he is ___. He is very caring.
A：yours; ours
B：your; our
C：yours; our
D：your; ours
答案(点此获取答案解析）
D
–David, is that _____ English teacher?
--Yes, he is ___. He is very caring.
A：yours; ours
B：your; our
C：yours; our
D：your; ours
cZ(g)在一定温度下的密闭容器内达到平衡后，t0时改变某一外界条件，化学反应速率(v)—时间(t)图象如下图。下列说法正确的是（ ） 
