大量蛋白尿是指24小时尿蛋白大于 （） A.100mg B.150mg C.1g

某溶液中含有Ba²⁺，Cu²⁺，Ag⁺，现用NaOH溶液、盐酸和Na₂SO₄溶液将这三种离子逐一沉淀分离，其流程如右图所示。下列说法正确的是（    ）

A．试剂A为Na₂SO₄溶液

B．沉淀3的化学式可能是BaSO₄

C．生成沉淀1的离子方程式为：Cu²⁺ + 2OH^－ = Cu(OH)₂↓

D．生成沉淀2的离子方程式为：Ag⁺+ Cl^－ = AgCl↓

上皮根鞘的残余上皮是（）

A.成釉器

B.牙 * *

C.牙囊

D.缩余釉上皮

E.Malassez上皮剩余

根据下列句子及所给汉语注释，写出空缺处各单词的正确形式。

每空只写一词。

1．Swimming is one of my               (业余爱好).

2．Our teacher often              (鼓励) us to speak English.

3．You can find the library              (容易地).

4．The three space              (英雄) returned to Beijing on September 29th.

5．British students have              (少) weeks off in the summertime than Chinese students.

6．Don't you know the importance of              (保护) the environment?

7．Jack's              (自然的) hair color is brown.

8．You can park your car              (在……外面) my house.

—How often do you exercise?

—_______[ ]

A. Less than three times a week.

B. More than 10 hours.

C. From one thirty to three.

D. I often do it.

嗜酸性