为了服装造型的需要，缝道一般设置在人体曲面的块面接合处，一、可以使缝道的处理简洁，二

脊椎动物运动系统的组成有

①皮肤   ②骨骼肌  ③骨  ④骨连接

A．①②③

B．①②④

C．②③④

D．①②③④

如图所示，两足够长的光滑金属导轨竖直放置，相距为L，一阻值为R的定值电阻与理想电流表串联接在两导轨间，匀强磁场与导轨平面垂直．一质量为m、有效电阻也为R的导体棒在距磁场上边界h处由静止释放．整个运动过程中，导体棒与导轨接触良好，且始终保持水平，不计导轨的电阻．下列说法正确的是

A．导体棒进入磁场可能做匀速直线运动

B．导体棒进入磁场时加速度一定小于重力加速度g

C．流经电流表的电流一定逐渐减小

D．若流经电流表的电流逐渐增大，则电流的最大值与R无关

We know that sugary sodas aren’t good for our bodies. Now it turns out that they may not be good for our minds, either. A new study of more than 260,000 people has found a link between sweetened soft-drinks and depression, and diet sodas may be making matters worse.

Americans drink far more sodas than people in other countries— as much as 170 liters per person per year. But the impact of this study isn’t limited to the United States. “Sweetened drinks, coffee and tea are commonly consumed worldwide and have important physical consequences. And they may have important mental-health consequences as well,” study author Dr Honglei Chen said in a statement.

The study studied 263,925 people between the ages of 50 and 71. Researchers followed their consumption of drinks like soda, tea coffee, and other soft drinks from 1995 to 1996 and then. 10 years later, asked them if they had been diagnosed with depression since the year 2000. More than 11,3000 of them had.

Participants who drank more than four servings of sodas per day were 30 percent more likely to develop depression than participants who did not drink sodas at all. People who stuck with fruit punch(鸡尾酒), had a 38 percent higher risk than people who didn’t drink sweetened drinks. And all that extra sugar isn’t the actual problem. Researchers say that the artificial sweetener aspartame may be to blame.

The study found a link but could not surely determine whether sodas and other sweet soft drinks cause depression. Still, the results “are consistent with a small but growing body of evidence suggesting that artificially sweetened beverages may be linked to poor health outcomes.”

But there’s a bright side for those who can’t live without their daily sodas. Adults who drank coffee had a 10 percent lower risk of depression compared to people who didn’t drink any coffee, according to the study. “Our research suggests that cutting out or down on sweetened diet drinks or replacing them with unsweetened coffee may naturally help lower your depression risk,” said Chen.

小题1:What has the new study of more than 260,000 people found?

A．Sugary sodas aren’t good for the physical health of old people.

B．Americans have a special tooth for sweet foods.

C．Sweetened soft-drinks may increase the risk of depression.

D．Sweetened soft-drinks have important physical consequences.小题2:What do we know about the process of the study?

A．About twenty-six thousand people participated in it.

B．The oldest participants were below 80 when the study was over.

C．Most of the participants had depression when the study was over.

D．The study lasted more than ten years from the beginning to the end.小题3:We infer that the underlined word “aspartame” in Paragraph 4 refers to something that _____.

A．can reduce the harm of sweetened drinks

B．is used to reduce the risk of depression

C．is mainly used to make fruit punch

D．is used to make something .sweet小题4:It is implied in the passage that ______.

A．more research is needed to confirm the new findings

B．the new findings aren’t consistent with any previous findings

C．cutting one’s sodas intake will surely reduce one’s depression

D．the new findings won’t have an impact on people’s drinking habits小题5:What should you drink in order to reduce the risk of depression?

A．Sodas.

B．Unsweetened coffee.

C．Sugary coffee.

D．Fruit punch.

有关真溶液的说法错误的是（）.

A、真溶液外观澄清

B、分散相为物质的分子或离子

C、真溶液均易霉败

D、真溶液型药剂吸收最快

党的“十八”大报告指出，坚持走自主创新道路，抓紧实施创新驱动发展战略，也是中国实现产业优化升级，加快经济发展方式转变的迫切需要。上述材料说明创新能（）

A.推动人类思维的发展

B.促进上层建筑的发展

C.推动生产力的发展

D.推动生产关系的变革