金融时报证券交易所指数是( )最具权威性的股价指数。A．美国 B．法国 C．英国

一个有一定厚度的圆盘，可以绕通过中心垂直于盘面的水平轴转动，圆盘加速转动时，角速度的增加量△ω与对应时间△t的比值定义为角加速度β．我们用电磁打点计时器、米尺、游标卡尺、纸带、复写纸来完成下述实验：（打点计时器所接交流电的频率为50Hz，A、B、C、D…为计数点，相邻两计数点间有四个点未画出）

①如图甲所示，将打点计时器固定在桌面上，将纸带的一端穿过打点计时器的限位孔，然后固定在圆盘的侧面，当圆盘转动时，纸带可以卷在圆盘侧面上；

②接通电源，打点计时器开始打点，启动控制装置使圆盘匀加速转动；

③经过一段时间，圆盘停止转动和打点，取下纸带，进行测量．（计算结果 保留3位有效数字）．

（1）用20分度的游标卡尺测得圆盘的直径如图乙所示，圆盘的半径r为______．cm；

（2）由图丙可知，打下计数点D时，圆盘转动的角速度为______rad/s；

（3）纸带运动的加速度大小为______m/s²，圆盘转动的角加速度大小为______．rad/s²．

患者女性，8个月，出生后即发现鼻梁较宽，两眼间距较大，常有流涕等上呼吸道感染症状，鼻腔渗出物清亮。

可排除的诊断有（）（提示影像学检查：脑积水、脑室扩大，前颅底骨质缺损，鸡冠变形。鼻腔渗出物糖含量超过3.3mmol/L。余无明显异常。）

A.鼻息肉

B.鼻部神经胶质瘤

C.嗅沟脑膜瘤

D.颅底脑膨出

E.鼻咽型脑膨出

F.先天性皮样囊肿

43kg/m普通钢轨尖轨高锰钢整铸12号道岔，直向过岔最高速度为（）。

A.100km/h

B.95km/h

C.85km/h

D.90km/h

阅读理解。

     Is a recently discovered hormone the reason why folks who lose weight can't keep it off?

     Like millions of other fat people, at 530 inches high, more than 300 pounds, Carnie Wilson was not just

fat. After trying all sort of diets that didn't work, she had to go to the stomach-bypass surgery (胃部迂回手

术), ie, have most of her stomach sewed up, only leaving tiny room to hold several tablespoonfuls at most.

Result: she simply couldn't eat the way she used to. In three years, Wilson is one third of her former weight.

     Wilson's experience is not all that unusual, and while doctors still aren't exactly sure what is going on, a

report in last week's Journal of Medicine offers an explanation. The loss of appetite in bypass patients may

be linked to a recently discovered hormone called ghrelin. Not only that, ghrelin may turn out to be one reason

we feel hungry and it's hard for dieters to keep weight off.

     Nowadays, researchers are careful to stress only what they know for sure. For the three conclusions, the

leading Dr. David of the University of Washington says, "I feel very solid about two of them." The first is that

ghrelin levels in the bloodstream rise significantly before meals and drop afterward. The second conclusion is

that ghrelin levels are higher on average in people who have lost weight from dieting.

     Dr. David is less sure of the third conclusion, that bypass patients have only a quarter as much ghrelin as

most people of normal weight. After all, ghrelin is produced by cells in the stomach Years ago, leptin, a

hormone was found as an appetite suppressant (食物抑制剂). But after years of trying, it had to be given up.

     What doctors suspect is that both leptin and ghrelin are part of a complex system of brain and body

chemicals that govern weight and appetite. That does not mean pharmaceutical (药物的) weight control is

forever out of the question. "In the next ten years, we will be able to develop new drugs to help people lose

weight healthily and effectively."

1. What can we learn about ghrelin according to the passage?[ ]

A. After meals ghrelin levels are higher in the bloodstream.

B. People who have lost weight have less ghreilin in their body.

C. Without ghrelin, people are really difficult to lose weight.

D. Ghrelin is something produced by cells in the stomach.

2. What is Dr. David not sure? [ ]

A. Pharmaceutical weight control is impossible.

B. There is less ghrelin in the bypass patients.

C. New drugs will be developed in 10 years.

D. Ghrelin levels are higher in people on diet.

3. In fact, people's weight and appetite are controlled by _____. [ ]

A. ghrelin and leptin

B. hormone and medicine

C. brain and body chemicals

D. stomach and food

4. What can we infer from the passage? [ ]

A. People with a lower ghrelin level go hungry easily.

B. Doctors managed to use leptin to control the appetite.

C. Doctors are optimistic about how to lose weight healthily.

D. The loss of appetite in bypass patient is linked to leptin.

某3年期债券年利率为5%，筹资费用率为1%，实际筹资额与名义借贷额相同，采用简化计算式计算的借贷资金成本为( )。

A．4.6%

B．4.7%

C．5.4%

D．6%