砌砖方法有几种？

阅读理解。

     What are you going to do if you are in a burning house? How will you escape it? Do you know how to save

yourself? Please read the following passage.

     Escaping a fire is a serious matter. Knowing what to do during a fire can save a life. It is important to know

the way you can use and show them to everyone in the family, such as stairs and fire escapes, but not lifts.

     From the lower floors of the building, escape through windows is possible. Learn the best way of leaving

by windows with the least chance of serious injury (伤). The second floor window is usually not very high from

the ground. Maybe it is safer to jump a short way than to stay in a burning building.

     Windows are also useful when you are waiting for help. Be sure to keep the door closed before opening the

window. Or smoke and fire may be drawn (吸) into the room. Keep your head low at the window to be sure

you get fresh air.

     On a second or third floor, the best windows for escape are these which open onto a roof. From the roof a

person can drop to the ground more safely. Bushes (灌木丛) and grass can help to break a fall.

1. The passage tells us how to escape from _____.

A. a fire

B. an earthquake (地震)

C. a flood

2. The second floor window is usually not very high from ______.

A. the house

B. the ground

C. the wall

3. You can't escape through ______ if you are in a burning house.

A. stairs

B. lifts

C. fire escapes

4. ______ to be sure you get fresh air when you are waiting for help in a burning house.

A. Keep your head low at the window

B. Keep your head high at the window

C. Keep the door open

5. According to the passage, which of the following is NOT true?

A. Escaping a fire is a serious matter.

B. Windows are also useful when you are waiting for help.

C. Bushes and grass can't help to break a fall.

在置信度确定的条件下，下面可用来减小区间的宽度是（）

A.增加样本含量

B.用μ界值代替t界值

C.按原来的样本含量重新抽样

D.去掉变异度比较大的观察值

E.以上均不正确

大卫生观包括的主要内容（）

A.卫生事业结构简单，是一种刚起步的社会性事业

B.生物、心理、社会医学模式的确立给人类健康事业带来全方位的影响

C.重点是社会环境的完美化

D.基础医学、临床医学、预防医学三大学科的基本内容

E.保障人类健康仅取决于医学发展

算法的空间复杂度是指

A．算法在执行过程中所需要的计算机存储空间

B．算法所处理的数据量

C．算法程序中的语句或命令条数

D．算法在执行过程中所需要的临时工作单元数

女性，70岁，5年前经过超声心动图诊断为扩张型心肌病，平时无症状。该患者应当长期服用的药物是（）

A.地高辛

B.呋塞米（速尿）

C.硝酸盐

D.螺内酯（安体舒通）

E.β受体阻滞剂