皮皮学,免费搜题
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【单选题】
Laughter There is an old saying in English: 'Laughter is the best medicine'. Until recently, few people took the saying very seriously. Now, however, doctors have begun to investigate laughter and the effects it has on the human body. They have found evidence that laughter really can improve people's health. Tests were carried out to study the effects of laughter on the body. People watched funny films, while doctors checked their heart rate, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, the heart rate and the rate of breathing it also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial. Other tests have shown that laughter appears to be capable of reducing the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group which tolerated the pain for the longest time was the group which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce endorphins (内啡肽) in the brain. These are natural chemicals which diminish both stress and pain, There is also some evidence to suggest that laughter helps the body's immune system, that is, the system which fights infection. In an experiment, one group of students watched a funny video while another group served as the control group - in other words, a group with which to compare the first group. Doctors checked the blood of the students in both groups and found that the people in the group that watched the video had an increase in the activity of their white blood cells, that is, the cells which fight infection. As a result of these discoveries, some doctors and psychiatrists (精神病学家) in the United States now hold laughter clinics, in which they try to improve their patients' condition by encouraging them to laugh, They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter. We learn from the first paragraph that laughter
A.
is good for one's health.
B.
is related to some illness.
C.
has been investigated long since.
D.
has no effect on the body.
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【单选题】什么是复合空间?
A.
比如一间房子、一件雕塑、一个杯子等。
B.
例如高层商厦的中庭,大空间处于多层小空间之中,小空间又包含在大空间之内。
C.
相同的单元空间在横向、纵向的发展。
【单选题】人体缺乏( )会导致脚气病。
A.
VB1
B.
VB2
C.
泛酸
D.
VC
E.
VE
【多选题】种子园去劣疏伐时应注意的问题有()。
A.
疏伐要及时
B.
疏伐要注意强度
C.
疏伐要分期进行
D.
疏伐前应充分调查以确定疏伐对象
【单选题】血中激素浓度极低,但生理作用非常明显,这是因为( )
A.
激素的半衰期非常长
B.
激素分泌的持续时间非常长
C.
激素随血液分布全身
D.
细胞内存在高效能的生物放大系统站
E.
激素具有相对特异性
【多选题】种子园的去劣疏伐应注意的问题有( )。
A.
疏伐要及时
B.
疏伐要注意强度
C.
疏伐要分期进行
D.
疏伐前要充分调查以确定疏伐对象
【单选题】血液中激素浓度极低,但生理作用非常明显,这是因为
A.
激素的特异性高
B.
激素的半衰期非常长
C.
激素分泌的持续时间长
D.
激素在体内随血液分布全身
E.
细胞内存在高效能的生物放大系统
【简答题】复合空间
【单选题】血中激素浓度极低,但生理作用非常明显,这是因为( )
A.
激素的特异性很高
B.
激素作用持续时间长
C.
激素的半衰期长
D.
细胞形成生物放大系统
E.
允许作用
【单选题】血液中激素浓度极低,但生理作用非常明显,这是因为
A.
激素的特异性高
B.
激素的半衰期非常长
C.
激素分泌的持续时间长
D.
细胞内存在高效能的生物放大系统
【判断题】跆拳道协会属于正式群体。
A.
正确
B.
错误
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