计算题：测得某自来水的碱度JD＝5.70mmol∕L，硬度YD＝7.55mmol∕L

病历摘要: 患者男性，28岁，劳累后心悸气促10年，加重1周入院。PE：心率110次/分，心音强弱不一，心律快慢不等，第一心音亢进，可闻及开瓣音，心尖部可闻及隆隆样杂音。

超声心动图示：二尖瓣口面积为0.54cm²，二尖瓣呈城墙样改变，无二尖瓣反流，左房内未见异常回声，下列哪些治疗最合适（）。

A.洋地黄

B.利尿剂

C.抗心律失常药

D.补充钾盐

E.补充镁盐

F.经皮二尖瓣球囊成形术；二尖瓣交界分离术

如果保险人在订立合同时未履行责任免除条款的明确说明义务，则( )。

A．保险人与被保险人共同承担损失责任

B．该责任免除条款无效

C．该责任免除条款仍然有效，但需退还部分保费

D．该保险合同无效

自理报检单位异地报检备案，保留并沿用原来代码。

阅读理解。

       Some problems are difficult to solve!  But there are a lot of number expressions that can help.

For example,if we put two and two together,we might come up with the right answer. We know that

two heads are better than one. It is always better to work with another person to solve a problem.

       Sometimes we can kill two birds with one stone. That is, we can complete two goals with only

one effort or action. But we must remember that two wrongs don't make a right. If someone does

something bad to you,you should not do the same to him.

       If you are going out with your girlfriend,or boyfriend,you do not want another friend to go along

on your date. You can just say to your friend:twos company, three's a crowd.

      A young child in school has to learn the three Rs. These important skills are reading, writing and

arithmetic.  These three words do not all start with the 1etter R,but they have the sound of R. Teachers

will give three cheers when their pupils do a good job.

     Some of my friends were confused and did not understand their schoolwork. They were at sixes

and sevens. In fact,they did not care whether they could finish high school. They saw 1ittle difference

between the two choices. But they were really happy when they completed their studies and graduated

from high school. They were in seventh heaven. They were on cloud nine.

     Last year,one of my friends applied for a better job at her office. I did not think she would get it. I

thought she had a hundred to one shot at the job. Other people at her office thought her chances were

a million to one. One reason was that she had been caught catching forty winks(打盹)  at the office. She

slept at her desk for short periods during the day. But her supervisor appointed her to the new job at

the eleventh hour-at the very last minute. I guess her lucky number came up.

1. What does the text mainly discuss?

A. How to solve the difficult problems. 

B. Differences between English number expressions. 

C. A number of English expressions using numbers. 

D. When and where to use the different number expressions.

2. The underlined sentence "two's company,three's a crowd" is______.

A.  an invitation    

B.  a refusal    

C. an apology  

D. a greeting

3. If you want to express someone's delight,you can say______.

A. He can kill two birds with one stone    

B. He has got three cheers

C. He is at sixes and sevens                

D. He is on cloud nine

4. The writer thinks it is_______ that makes her friend find the new job. 

A. her good luck              

B. her good fame

C. her workmates help          

D. her supervisors neglect of duty

现网阿朗CP4.0设备，主机柜最多配置（）扇区。

A.1

B.2

C.3

D.4