题目内容
（请给出正确答案）
A.Several hours
B.Several days
C.Less than a quarter
D.Less than a second
参考答案
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
网友提供的答案
更多“19. How long do people need to know how they like another person？”相关的问题
A、One third
B、Two thirds
C、A half
D、Three quarters
-__________.
A: No, I don't need your help.
B; No, I don't buy anything.
C; Yes, I need some salt.
A、60%
B、70%
C、80%
D、90%
A、We are able to watch the brain in action.
B、People will become happy when in love.
C、Unconditional love does not exist.
D、All kinds of love are unconditional.
Passage Three Questions 21 to 25 are based on the following passage. Are you diligently exercising but seeing no results around your midsection (上腹部)? It’s not just you. Two new studies may explain why many people who begin exercise programs often lose little to no weight in the long run. In the first study, published in the online science journal PLoS One, researchers compared the daily energy consumption of Westerners and the Hadza, a population of hunter-gatherers living in northern Tanzania. Many believe modern Westerners burn fewer calories than in the past because their lives have become more sedentary (久坐的). The Hadza, who are generally very lean, hunt and look for food without modern tools such as vehicles or guns. Men walk about seven miles each day, while women walk about half that. What was surprising was that although the Hadza seem to be more active, the researchers found little difference in calories burned between the Hadza and the Westerners. The second study, published in Obesity Reviews, analyzed the effect of exercise interventions on body composition. The researchers found that – contrary to popular belief – when people exercise but keep their energy intake constant, their resting metabolic (新陈代谢的) rate actually goes down. Exercisers who ate more calories than they usually do did burn more fat than predicted, but some overate and negated the effects of their hard work. These studies suggest two things: exercise programs may not lead to as much calorie burn as you would think, and many people start eating more when they exercise, and they may eat too much. Bottom line, if you start exercising to lose weight, you won’t succeed with the mentality of “I can eat anything because I’ll burn it off later”. You will have better results if you choose a healthy diet of whole grains, fruits and vegetables, lean proteins and healthy fats while exercising. Although these two studies show that diet may be more important than exercise for weight loss, don’t discount the other benefits of exercise, including decreased stress and anxiety, improved mood and reduced risk of cardiovascular (心血管的) disease, diabetes (糖尿病) and some cancers. 21. What do we know about the Hadza?
A、They are fat for they always like to sit down.
B、They do not have modern hunting tools.
C、They walk seven miles every day on average.
D、They live in southern Tanzania.
A、Those who are not serious about relationship.
B、Those who care about appearance very much.
C、Those who have good visual appearances.
D、Those who value intellect more than faces.
A、Denied
B、Improved
C、Aroused
D、Doubled
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