问题 解答题

如图是肌肉的协作关系示意图,请根据图分析回答下列问题

①表示______,在图A中处于______状态;②表示______,在图A中处于______ 状态,②在图B中处于______状态,①在图B中处于______ 状态.

答案

骨的位置的变化产生运动,但是骨本身是不能运动的.骨的运动要靠骨骼肌的牵拉.骨骼肌中间较粗的部分叫肌腹,两端较细的呈乳白色的部分叫肌腱.肌腱可绕过关节连在不同的骨上.骨骼肌有受刺激而收缩的特性,当骨骼肌受神经传来的刺激收缩时,就会牵动骨绕着关节活动,于是躯体就会产生运动.但骨骼肌只能收缩牵拉骨而不能推开骨,因此与骨相连的肌肉总是由两组肌肉相互配合活动的.图A屈肘时,①肱二头肌收缩,②肱三头肌舒张;图B伸肘时,①肱二头肌舒张,②肱三头肌收缩.

故答案为:肱二头肌;收缩;肱三头肌;舒张;收缩;舒张

阅读理解

Chinese and Western eating habits are different. In China, the dishes are placed on the table and everybody shares. It is always polite to let guests or elderly people at the table taste every dish first. But in the West, everyone has his or her own plate of food.

Although there are no strict rules on how to set chopsticks and spoons, there are some things you should never do during a Chinese banquet (筵席).

 Firstly and most importantly, don’t put your chopsticks upright in the rice bowl. Instead, lay them on your dish. The reason for this is that when people die, family members give them a bowl full of rice with a pair of chopsticks sticking out upright in it. So if you stick your chopsticks in the rice bowl, it appears that you want someone at the table to die.

Make sure the spout(容器嘴) of the teapot is not facing anyone, as this is impolite. The spout should always be directed to where nobody is sitting, usually just outward from the table.

Don’t tap on your bowl with your chopsticks. Beggars tap on their bowls, so this is not polite. Also, when the food is coming too slow in a restaurant, you should not tap on your bowl. If you are in someone’s home, it is like insulting the cook.

小题1:What is the difference between Chinese and Western eating habits according to Paragraph 1?

A.In China people are very polite, while in the West people are not so.

B.In China people share the dishes, while in the West people eat separately.

C.In China people use the chopsticks, while in the West people use the knife and fork.

D.None of the above.小题2:What is the main idea of the third paragraph?

A.The reason why chopsticks shouldn’t be put upright in the rice bowl.

B.The Chinese use chopsticks to eat.

C.The Chinese eating habits.

D.How to use chopsticks.小题3:Which of the following statements is TRUE according to the passage?

A.It is polite to taste the dishes before the guests or the elderly.

B.You can put your chopsticks wherever you want.

C.Never tap on your bowls with the chopsticks during the meal.

D.Teenagers can stick their chopsticks in the rice bowl.小题4:The underlined word “insulting” in the last paragraph probably means “_________”.

A.playing jokes on

B.laughing at

C.treating badly

D.looking down upon

判断题