问题 填空题

小明学习了分子的性质后做了如下实验:先在一支试管中装一半红墨水,再在液面上注满酒精(缓缓注入),加盖密封后静置,30日后再观察,现象如图所示.小明做的实验说明______和______.混合均匀后,分子______(选填“继续”或“停止”)运动.

答案

据图可以看出,30日后,红墨水和酒精的混合物体积减小了,这是因为酒精分子和水分子之间有一定的间隔,酒精分子和水分子不断运动到彼此的分子间隔间;混合均匀后,分子仍然继续运动,故填:分子是不断运动的;分子间有间隔;继续.

填空题
单项选择题

(A)

Next time a customer comes to your office, offer him a cup of coffee. And when you’re doing your holiday shopping online, make sure you’re holding a large glass of iced tea. The physical sensation of warmth encourages emotional warmth, while a cold drink in hand prevents you from making unwise decisions-those are the practical lesson being drawn from recent research by psychologist John A. Bargh.

Psychologists have known that one person’ s perception of another’ s "warmth" is a powerful determiner in social relationships. Judging someone to be either "warm" or "cold" is a primary consideration, even trumping evidence that a "cold" person may be more capable. Much of this is rooted in very early childhood experiences, Bargh argues, when babies’ conceptual sense of the world around them is shaped by physical sensations, particularly warmth and coldness. Classic studies by Harry Harlow, published in 1958, showed monkeys preferred to stay close to a cloth "mother" rather than one made of wire, even when the wire "mother" carried a food bottle. Harlow’ s work and later studies have led psychologists to stress the need for warm physical contact from caregivers to help young children grow into healthy adults with normal social skills.

Feelings of "warmth" and "coldness" in social judgments appear to be universal. Although no worldwide study has been done, Bargh says that describing people as "warm" or "cold" is common to many cultures, and studies have found those perceptions influence judgment in dozens of countries.

To test the relationship between physical and psychological warmth, Bargh conducted an experiment which involved 41 college students. A research assistant who was unaware of the study’s hypotheses, handed the students either a hot cup of coffee, or a cold drink, to hold while the researcher filled out a short information form: The drink was then handed back. After that, the students were asked to rate the personality of "Person A" based on a particular description. Those who had briefly held the warm drink regarded Person A as warmer than those who had held the iced drink.

"We are grounded in our physical experiences even when we think abstractly." says Bargh.

According to Paragraph 1, a person’s emotion may be affected by().

A. the visitors to his office

B. the psychology lessons he has

C. his physical feeling of coldness

D. the things he has bought online