A party _______ in our school next month

On the graduation day, he received from his father a nice present ______ a note was attached, saying “I’m proud of you.”

A．on which

B．to which

C．with which

D．in which

佛教如何看待环保？

下列变化过程中，只破坏共价键的是(　　)

A．I₂升华

B．NaCl颗粒被粉碎

C．HCl溶于水得盐酸

D．从NH₄HCO₃中闻到了刺激性气味

拌制混凝土用水的pH值不宜( )。

A．小于4

B．大于4

C．大于6

D．小于6

读表，完成下列各题。

我国某地天气变化表

由该天气系统控制的图为（）

A．a曲线

B．b曲线

C．c曲线

D．d曲线