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同类题1

根据短文内容,从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Empathy

    Last year, researchers from the University of Michigan reported that empathy, the ability to understand other people, among college students had dropped sharply over the past 10 years.____Today, people spend more time alone and are less likely to join groups and clubs. Jennifer Freed, a co-director of a teen program, has another explanation. Turn on the TV, and you're showered with news and reality shows full of people fighting, competing, and generally treating one another with no respect.____There are good reasons not to follow those bad examples. Humans are socially related by nature.____Researchers have also found that empathetic teenagers are more likely to have high self-respect. Besides, empathy can be a cure for loneliness, sadness, anxiety, and fear.Empathy is also an indication of a good leader. In fact, Freed says, many top companies report that empathy is one of the most important things they look for in new managers.____ “Academics are important. But if you don't have emotional (情感的) intelligence, you won't be as successful in work or in your love life,” she says.What's the best way to up your EQ (情商)? For starters, let down your guard and really listen to others.____To really develop empathy, you'd better volunteer at a nursing home or a hospital, join a club or a team that has a diverse membership, have a “sharing circle” with your family, or spend time caring for pets at an animal shelter.

A. Everyone is different, and levels of empathy differ from person to person.

B. That could be because so many people have replaced face time with screen time, the researchers said.

C. “One doesn't develop empathy by having a lot of opinions and doing a lot of talking,” Freed says.

D. Humans learn by example—and most of the examples on it are anything but empathetic.

E. Empathy is a matter of learning how to understand someone else—both what they think and how they feel.

F. Good social skills—including empathy—are a kind of “emotional intelligence” that will help you succeed in many areas of life.

G. Having relationships with other people is an important part of being human—and having empathy is decisive to those relationships.

同类题3

某同学想研究氨基酸的分离和鉴定的方法,已知实验室中有0.5%的赖氨酸、脯氨酸、缬氨酸、苯丙氨酸、亮氨酸溶液以及它们的混合液(各组份浓度均为0.5% );A.器材:层析缸、毛细吸管、喷雾器、滤纸、其他相关器材( 剪刀、铅笔、透明胶带等);B.试剂:层析液(4份水饱和的正丁醇和1份醋酸的混合物)、0.1%茚三酮溶液.若该同学想证明混合液确实含有上述 5 种氨基酸,请利用题目所给条件设计试验:

(1)实验原理:

①所有氨基酸和一切蛋白质都能和茚三酮发生颜色反应

②在一定条件下,不同的氨基酸在层析液中的____ 不同,所以在滤纸上的扩散速度不同,从而出现在滤纸的不同位置上

(2)实验步骤:

①取层析滤纸一张,剪成20厘米长、14 厘米宽的滤纸条,在纸的一端距边缘 2~3 厘米处用铅笔画一条直线,在此直线上每间隔2厘米作一记号,共需作____ 处记号;

②用____ 吸取氨基酸样品点在标记上,干燥后重复2﹣3次.

③将处理好的滤纸条卷成筒状用透明胶带固定,放入加好了层析液的层析缸中,待层析液上升到一定阶段时取出滤纸,自然风干;本步骤需要注意的是:点样的一端在下; 层析液的液面要____ ( 填“高于”或“低于”)点样线.

④用喷雾器向滤纸上均匀喷上____ ,待干燥后观察并记录层析斑点的位置.

(3)已知5种氨基酸的扩散速度为:赖氨酸<脯氨酸<缬氨酸<苯丙氨酸<亮氨酸.如图为实验结果,不同氨基酸用1~5表示,请问图中标号为1的氨基酸是____ .