问题 单项选择题

甲状腺功能亢进时,腹泻的主要发生机制是()

A.肠蠕动增强

B.肠内容物渗透压增高

C.肠腔内渗出物增加

D.肠液分泌增多

E.VIP的作用

答案

参考答案:A

解析:甲亢时,因甲状腺激素、儿茶酚胺等作用使迷走神经张力增加,导致胃肠排空和蠕动加快,引起小肠吸收不良,表现为顽固性腹泻或大便次数增多,但很少腹痛,大便可呈稀糊状或水样便,大便化验阴性,无致病菌,肠镜检查无异常。故答案为A。

阅读理解

One day, a boy had a fight with one of his classmates. He didn’t wait until school was over, and hurried home to his grandfather. He told him his story angrily. “He is really bad,” the boy said, “and I hate him.”

The grandfather said, “Let me tell you a story. When I was a boy, I, too, sometimes hated others for what they did…”

As the boy listened carefully, the grandfather went on,“There are always two tigers inside my heart. One is good and kind. He gets on well with everything around him. But the other is bad and unfriendly. Even the smallest thing will make him angry. He fights with everyone all the time, and for no reason. He can’t think carefully because he always hates others. It is difficult to live with these two tigers inside my heart. They both try to control me.”

The boy looked into his grandfather’s eyes and asked,“Which tiger always controls you, Grandfather?”

The old man said slowly and seriously, “The one that I feed. I always feed the good and kind tiger, so I never hate others and seldom get angry now.”

根据短文内容,选择最佳答案。

小题1:The boy went to his grandfather ____.

A.before he went to school

B.when he went to school

C.after school was over

D.after he had a fight小题2:The good tiger ____ everything around him.

A.doesn’t like

B.gets along well with

C.isn’t interested in

D.wants to eat小题3:The bad tiger fights with everyone all the time ____.

A.because others wants to kill him

B.because he wants to eat others

C.for no reason

D.because others aren’t friendly to him小题4:The good tiger can control the grandfather because ____.

A.the good tiger is much stronger

B.the good tiger can get along well with others

C.the grandfather treats the tiger very well

D.the grandfather hates the bad tiger小题5:The writer wants to tell us ____ in the passage.

A.how to feed tigers well

B.how to control our feelings

C.how to get along with others

D.how to fight with others

多项选择题