α、β受体阻滞药是
A．奎尼丁B．利多卡因C．普萘洛尔D．维拉帕米E．阿托品
参考答案：B
听觉障碍儿童年龄越（）越具可塑性，及早进行训练，听觉障碍儿童的弱势能力也能得到充分发展 。
This is ______ classroom. ______ is over there. [ ]
A.our, Yours
B.our, Your
C. ours, Yours
D.us, Yours
