问题 单项选择题

“脂肪动员”的脂酶中的限速酶是

A.甘油一酯脂肪酶

B.甘油二酯脂肪酶

C.甘油三酯脂肪酶

D.甘油激酶

E.肝脂酶

答案

参考答案:C

解析: 考查脂肪的分解代谢,特别是脂肪动员。储存在脂肪细胞中的脂肪被脂肪酶逐步分解为游离脂肪酸及甘油并释放入血供其他组织氧化利用,该过程称为脂肪的动员。在脂肪动员中,脂肪细胞内激素敏感性甘油三酯脂肪酶起决定性作用,它是脂肪分解的限速酶。

阅读理解

阅读短文,选择正确答案。

Dear Alice, 

       I just received your letter. And I was very surprised to know that you decided to drop out of school and

wanted to be a model (模特).

       Being a model for a living is not easy. In fact, a famous person like me has a lot of problems that you

couldn't see. I can't eat what I like, even though I'm very hungry. Keeping thin makes me look more beautiful

on the stage because no one would like to see a heavy model.

       Besides, I have to wear a heavy coat in the hot sun, in a swimming suit in the cold air. And practicing

walking nicely every day is tiring for me.

      You might say I made much money from modeling. Bus my dear niece (侄女), you have to know that

money is, nothing, knowledge is everything. School is important and everyone should go to school for a certain

period of time. The longer they stay at school, the better they will be. Very often, I hope I can give up my job

and continue my studies at school. But it is very difficult for me to go back to school again. I am too old to go

back to school now.

      You are a pretty young girl with a bright future. You only have one year to finish your studies in high school.

A year is really short. Please do consider my words carefully before you decide. Of course, there is only one

thing I care about, and that is your happiness.

                                                                                                                          Love,

                                                                                                                          Emma

1.What was Emma surprised about? [ ]

A.Alice wanted to keep thin.

B.Alice decided not to do modeling.

C.Alice ate too much and became a heavy girl.

D.Alice decided not to finish her studies at school.

2.Emma can't go back to school again, because _______. [ ]

A.she is tired of being a student

B.she wants to make more money from modeling

C.she is so old that she has missed the best time in school

D.she has done a good job and makes a lot of money as a model

3.How long does Alice still have to study in high school? [ ]

A.One year.

B.Two years.

C.Three years.

D.The longer, the better.

4.Emma only cares about ________. [ ]

A.Alice's beauty

B.Alice's happiness

C.Alice's age

D.Alice's swimming suit

5.From the letter we know that ________. [ ]

A.Emma is a famous model

B.Emma likes being a model for a living

C.Alice will go on her studies in high school

D.Emma can eat what she likes when she is very hungry

单项选择题 A1/A2型题