下面的（）体现了非标准设备的特点。 A．按业主提交的图纸和技术要求组织生产 B．由设

现有A、B、C、D、E五种盐溶液，分别由K⁺、NH₄⁺、Ag⁺、Ba²⁺、Al³⁺、Cl^-、Br^-、CO₃^2-、SO₄^2-、NO₃^- 中的阳离子和阴离子各一种组成（五种盐所含阴、阳离子各不相同）已知：

①A+B→白色沉淀      ②A+D→白色沉淀        ③A+C→白色沉淀

④D+B→白色沉淀+无色气体     ⑤A溶液中c（H⁺）=c（OH^-）

⑥B溶液中c（H⁺）=1×10^-12mol•L^-1   ⑦C、D、E三种溶液的pH＜7，

根据以上实验事实可以推出（用分子式表示）

A为______；B为______；C为______；D为______；E为______．

写出以上①②③④各步反应的离子方程式：

①______，②______，

③______，④______．

This morning I found red wallet on the campus. Girls usual like red, so I believed the wallet was belonged to a girl student. I opened it, try to find out whose it was. Therefore, I found nothing but 300 yuan in it. I was wondering what to do with it while suddenly my classmates Chen Yang passed by. She suggested she put up a Lost and Found notice and I did so. I wrote down my telephone number and ask the owner to call me after she saw it. Later, a girl came to claim it on 3 o’clock this afternoon.

采用局部控释给药的优势不包括

A．副作用小

B．自行使用方便

C．使用剂量小

D．龈沟局部浓度高

E．口腔中维持浓度时间较长

—Ruth, I want to have some milk.

—There's ______ left. What about orange juice? [ ]

A. few

B. much

C. none

D. many

下列各项中，符合会计要素收入定义的是( )。

A．罚款所得
B．出售材料收入
C．出售无形资产净收益
D．出售固定资产净收益