下图是一正弦交变电流的电流图象．此正弦交变电流的频率和电流的有效值分别为（ ）

结肠肿瘤的典型X线征象是（）

A.充盈缺损

B."杯口"征

C."鸟嘴"征

D."鹅卵石"征

E."铅管"征

某女，孕5个月发现残角子宫妊娠活胎，有生育要求，以下处理哪项最恰当

A．期待足月后剖腹产

B．立即手术，剖宫取胎，同时行残角子宫切除术

C．立即手术，剖宫取胎，同时行残角子宫切除术+患侧输卵管切除术+对侧输卵管绝育术

D．立即手术，剖宫取胎，同时行残角子宫切除术+患侧输卵管切除术

E．立即手术，剖宫取胎

阅读理解

     Technology helps people do everything from planning to meet for a movie to keeping in touch with

a friend who lives in a different country.

     When planning to get together with friends,Julian said,"If I want to go and see a movie with a few

friends,I usually send them text messages.By telephone,you have to call every single friend one by one.

But text messaging allows you to send the same message to as many people as you'd like,which saves

a lot of time."

    Email,IM,and other lowcost methods of communication also help people keep longdistance friendships

in ways they couldn't have even a few years ago.

    Mike told us,"I had this friend when I was 8 or 9,and then she moved away to the country.We

promised to stay friends and to send letters,and at the start we did.Then the letters got fewer and fewer

and we at last stopped writing to each other.I think if we had had email,we would still be in touch."

     James found out about cost the hard way.He said,"I called my friend in New Zealand,which is

halfway around the world,and it cost me over $200!So now I just stay up  late to see if I can catch him

on MSN or I write an email."

     Email,IM,and other lowcost ways of keeping in touch also allow people to develop brief

acquaintances (与人相识) into longlasting friendships.Andrea told us,"I met this really cool girl.We

sometimes email each other.We've been in touch over half a year and it's nice to talk to her."

1.What is this passage mainly about?

A. Technology has improved greatly.

B. Technology can help our social lives.

C. Technology keeps faraway friends close.

D. Text messages bring advantages to our life.

2. How does Julian usually get in touch with a group of friends?

A. By emailing them.

B. By chatting with them on MSN.

C. By sending them text messages.

D. By giving them a phone call.

3. In Mike's opinion,he lost touch with his friend mainly because________.

A. they lost interest in keeping in touch

B. their friendship was not strong enough

C. they were too busy to write to each other

D. they couldn't use email to keep in touch then

4. What does James most probably think of calling his friend in New Zealand?

A. Convenient. 

B. Costly.  

C. Difficult.  

D. Necessary.

5. The writer uses Andrea's story to show that________.

A. everyone can make good use of technology

B. longlasting friendships can be gained anywhere

C. there are many kinds of ways of keeping in touch

D. it is easier to make new friends than before due to technology  

影响测量精度的直接因素有（）

A、终端设备校准，

B、射频算法，

C、天线.

对于客户信用评级，理解有误的是( )。

A．仅指商业银行对客户偿债能力的计量和评价
B．评价的主体是商业银行
C．评价的结果是给出客户信用等级
D．评价的目标是客户违约风险大小