M型超声心动图的主动脉波群可检查哪种结构的运动曲线 A．二尖瓣腱索 B．左室后壁 C

下列变化中属于化学变化的是（　　）

A．榨取果汁

B．燃放烟花

C．切割玻璃

D．粉碎废纸

When I was about 12, I had an enemy, a girl who liked to point out my shortcomings.

Week by week her list grew: I was very thin, I wasn’t a good student, I talked too much, I was too proud, and so on. I tried to hear all this as long as I could. At last, I became very angry. I ran to my father with tears in my eyes.

He listened to me quietly, then he asked. “Are the things she says true or not? Janet, didn’t you ever wonder what you’re really like ? Well, you now have that girl’s opinion. Go and make a list of everything she said and mark the points that are true. Pay no attention to the other things she said.”

I did as he told me. To my great surprise, I discovered that about half the things were true. Some of them I couldn’t change (like being very thin), but a good number I could—and suddenly I wanted to change. For the first time I go to fairly clear picture of myself.

I brought the list back to Daddy. He refused to take it.“That’s just for you,” he said.“You know better than anyone else the truth about yourself. But you have to learn to listen, not just close your ears in anger and feeling hurt. When something said about you is true, you’ll find it will be of help to you. Our world is full of people who think they know your duty. Don’t shut your ears. Listen to them all, but hear the truth and do what you know is the right thing to do.”

Daddy’s advice has returned to me at many important moments. In my life, I’ve never had a better piece of advice.

小题1:Which do you think would be the best title for this passage?

A．Not an Enemy, but the Best Friend

B．The Best Advice I’ve Ever Had

C．My Father

D．My Childhood小题2: What does “Week by week her list grew” mean?

A．Week by week she discovered more shortcomings of mine and pointed them out to me.

B．She had made a list of my shortcomings and she kept on adding new ones to it so that it was growing longer and longer.

C．I was having more and more shortcomings as time went on.

D．Week by week, my shortcomings grew more serious.小题3:Why did her father listen to her quietly?

A．Because he believed that what her daughter’s “enemy” said was mostly true.

B．Because he had been so angry with his daughter’s shortcomings that he wanted to show this by keeping silent for a while.

C．Because he knew that his daughter would not listen to him at that moment.

D．Because he wasn’t quite sure which girl was telling the truth.小题4:What did the father do after he had heard his daughter’s complaint?

A．He told her not to pay any attention to what her“enemy” had said.

B．He criticized (批评) her and told her to overcome her shortcomings.

C．He told her to write down all that her“enemy” had said about her and pay attention only to the things that were true.

D．He refused to take the list and have a look at it.

为满足经济建设对基础测绘资料的需求，完善基础地理信息库，某市准备生产该地区1:1万比例尺的数字地面高程模型(DEM)。现已完成了前期的准备工作，包括：全部测区的航空摄影、区域网外业控制点的测设和解析空中三角测量(空三加密)等工作。

1．测区自然地理概况

测区位于华北地区的一个地级城市，总面积约4500km²。测区为平地和丘陵两种地形，测区内海拔高度平均低点为20m，最高海拔230m。

2．主要技术依据

(1)《基础地理信息数字产品1:10000、1:50000生产技术规程第2部分：数字高程模型(DEM)》(CH/T 1015.2—2007)；

(2)《基础地理信息数字产品1:10000、1:50000数字高程模型》(CH/T 1008—2001)；

(3)《基础地理信息数字产品1:10000、1:50000生产技术规程第1部分：数字线划图(DLG)》(CH/T 1015.1—2007)；

(4)《数字测绘成果质量要求》(GB/T 17941—2008)；

(5)《数字测绘成果质量检查与验收》(GB/T 18316—2008)；

(6)平面系统采用1980西安坐标系；

(7)高程系统采用1985国家高程基准。

3．航空摄影资料

航空摄影采用传统的航空摄影方式，航摄比例尺1:1万，航摄像机型号为RC—30，像幅为23cm×23cm，航摄仪焦距152mm，影像扫描分辨率0.02mm，像片类型为彩色片。

航摄总面积为4500km²，测区共布设34条航线，每条航线112张航片，测区航片总数为3808张，东西向飞行，航片的航向重叠65%，旁向重叠35%。

航空摄影成果已通过质检部门的检查验收，其飞行质量和影像质量均满足规范和设计要求。

4．其他资料情况

1)区域网外业像片控制点测量成果情况

整个测区的区域网外业控制点的布设和测量工作已全部完成，分别按平地和按丘陵地区布设方案实施，其基本情况如下。

(1)平坦地区航线按每4条基线在其周边布设6个平高点。

(2)丘陵地区航线按每4条基线在其周边布设8个平高点。

(3)区域网外业像片控制点的精度和成果质量均符合规范和技术设计的要求，质检部门已同意将该成果移交给解析空中三角测量和立体测图工序使用。

2)解析空中三角测量成果基本情况

整个测区的解析空中三角测量的工作已全部完成，其成果质量符合规范和技术设计的要求，并已全部通过质检部门的检查验收，同意移交给下一工序使用。

问题：

本案例中高程的估算精度是多少

下列有关“灌砂法”的叙述中，错误的有（）

A、本试验方法适用于现场测定细粒土、砂类土和砾类土的密度

B、在测定细粒土的密度时，可以采用Φ100mm的小型灌砂筒，如试样的最大粒径超过15mm，则应相应增大灌砂筒和标定罐的尺寸

C、量砂采用粒径为0.25mm～0.5mm清洁干燥的均匀砂，每次使用之前均应将其烘干，并即刻使用，以防止其吸水而造成体积膨胀

D、标定罐的容积采用罐中加水称重的方法进行标定

下列各项中属于资金营运活动的是（）。

A.采购原材料

B.购买国库券

C.销售商品

D.支付现金股利