大型药品批发和零售连锁企业的仓库面积不应小于A．500平米B．150平米C．50平米

用加热高锰酸钾的方法制取氧气．实验装置如图所示．请回答下列问题：

（1）反应的文字表达式为 _______________ ；

（2）检验装置气密性的操作如图所示：先将导管伸入液面下，用手紧握试管，观察到___________，松开手后，导管内有一段上升液柱，说明该装置气密性良好．

（3）实验结束后的安全操作是先要______ ，然后再_______ ．

Like a growing number of young women in Vietnam’s northern part city of Haiphong, Pham Thi Hue was infected with HIV by her husband, one of the town’s many drug users. But instead of being shamed into silence, as Vietnamese with HIV and AIDS are, the 25-year-old tailor and mother of one went public, appearing on television and at conferences. Her business suffered and her neighbors insulted (辱骂)her, but Hue has now become the public face of Mothers and Wives, an HIV/ AIDS support group established in Haiphong by a Norwegian nongovernmental organization and her neighborhood’s People’s Committee. Last year, she founded a smaller group named after a local flower. People who need advice on treatment or help preparing bodies for burial can dial a hot line and get assistance from able and sympathetic(同情的)HIV victims. “We gather to support each other,” Hue says. “When we are sick, what we need most is encouragement and comfort from people who understand our situation and are willing to share our happiness, as well as our sadness.”

On a hot and damp night last month, Hue welcomed into her small home a very thin woman, also a tailor, who was HIV positive. The woman tearfully told Hue that she had not told anyone about her condition, fearing that she would lose customers and that her daughter would be insulted at school. Hue became the wise elder, offering medical and personal advice.

小题1:What did Pham Thi Hue do after she was infected with HIV?

A．She kept silent

B．She worked as usual

C．She stayed at home and cried every day.

D．She went public and gave help to others.小题2:It can be inferred from the passage that the group Pham Thi Hue founded is made up of____.

A．drug users

B．HIV victims

C．all kinds of patients

D．poor people小题3: From the passage we can learn that Pham Thi Hue is a woman who is_______.

A．weak and kind

B．foolish and idle

C．brave and helpful

D．cautious and energetic

火焰清理适用于所有钢种的坯料。

脊柱退行性变主要是椎间盘的改变，下列属于椎间盘改变的是（）

A.纤维环变性并出现裂隙

B.软骨板变薄和玻璃样变

C."真空"征象

D.椎间盘形成Schmorl氏结节

E.髓核脱出

最常见的道岔是（）道岔。