扣件式钢管脚手架计算强度和稳定性时，要考虑荷载效应组合，永久荷载分项系数（），可变荷

对于可重复使用的血液透析器，下列做法错误的是（）

A.复用前应向患者或其委托人说明复用的意义及可能遇到的不可预知的危害，可选择是否复用并签署知情同意书

B.乙型肝炎病毒标志物阳性患者使用过的血液透析器不能复用

C.丙型肝炎病毒标志物阳性、艾滋病病毒携带者或艾滋病患者使用过的血液透析器可以复用

D.其他可能通过血液传播传染病的患者使用过的血液透析器不能复用

E.对复用过程所使用的消毒剂过敏的患者使用过的血液透析器不能复用

阅读理解

     Six astronauts are about to experience what it's like to travel to Mars and back, only without actually

leaving Earth.Three Russian astronauts will join three colleagues from other countries as they are locked

up together for a year and a half on a simulated(模仿的) mission to Mars.The mission is called Mars

500.

     The Mars500 mission at Moscow's Institute of Biomedical Problems will test the psychological and

physical effects of longterm isolation on humans.

    The group's leader, engineer Sytev, looks at the threesquaremeter place that will be his personal

habitation."This phone will work for only 11 days.When we are near the Earth, it will be switched off, "

said Sytev.Sytev is a newlywed.He says the most difficult thing will be to be separated from his wife and

the persons around him.He finds it difficult to leave some of his habits behind-all their activities will be

directed towards a certain goal and that he won't see sunsets, sunrises, won't feel rain for 18 months.

     After 250 days, three of the astronauts will simulate landing on Mars.The other three will wait for

them-in the mock spacecraft-for a month.All communication with Earth will be via email and will have as

much as a 40minute delay, like on a real Mars mission.

     Suvorov is a physician.He and other scientists will monitor the astronauts."This experiment is unique

because the six persons will be isolated for a long period of time, " noted Suvorov."They will have to

make decisions on their own and only then report to the Earth, and the Earth will tell them whether they

did the right thing or not."He says the experiment will pave the way for a real Mars journey later this

century."We are going to determine how much food and other products of daily use are needed, and

how people of different cultures, of different training can find common language and work on performing

their tasks, " added Suvorov.

      Mars500 is the third in a series of flight simulations.The earlier ones were shorter.The current

experiment is set to end in November 2011.

1. The underlined word "mock" in Paragraph 4 means ________.

A. simulated  B. advanced

C. small  D. comfortable

2. What do we learn about the Mars500 mission according to the text?

A. The base is located in New York, America.

B. It is a simulation program designed for the future space expedition.

C. All astronauts will spend 18 months in the spacecraft.

D. Astronauts can't use any mobile phone during the experiment.

3. What is the most difficult thing that Sytev will face during their training?

A. Standing the isolation and loneliness.

B. There existing a 40minute delay.

C. Lacking food and other products.

D. Being monitored by Suvorov and other scientists.

4. We can learn from Suvorov's words that ________.

A. it's hard for the astronauts to perform their tasks together

B. more experiments will be carried out for a real journey

C. the astronauts should learn to make decisions on their own

D. different cultures of the astronauts don't matter any more

（）指的是不能够导电的物体。

在窗体上画一个命令按钮，然后编写如下事件过程：
Option Base 1
Private Sub Command1_Click()
Dim a
a=Array(1,2,3,4)
j=1
For i=4 To 1 Step-1
s=s+a(i)*j
j=j* 10
Next i
Print s
End Sub
运行上面的程序，单击命令按钮，其输出结果是 【15】 。

李清照自号易安居士，那么易安二字取自陶渊明《归去来兮辞》当中某句之雅意。请问是哪一句？