问题 单项选择题

原人参二醇是( )

A.β-香树脂烷型三萜
B.α-香树脂烷型三萜
C.达玛甾烷型
D.羊毛脂甾烷型
E.甾醇类

答案

参考答案:C

解析: 三萜类成分主要有以下两大类:四环三萜(羊毛脂甾烷型和达玛烷型:原人参二醇)和五环三萜(①齐墩果烷型(即β-香树脂烷型),以齐墩果酸为代表;②乌苏烷型(即α-香树脂烷型或熊果烷型),以乌苏酸为代表;③羽扇豆烷型,以白桦脂醇、白桦脂酸为代表;④其他类型,有木栓烷型、羊齿烷型和异羊齿烷型、何帕烷型和异何帕烷型等)。

单项选择题 A1/A2型题
阅读理解

阅读理解

     When I was a foreign teacher in China, every day I taught English to my students and they taught me    about China. One day the topic turned to saying "I love you". I was shocked to learn that not one of my    students had said  this to their mothers, nor had their mothers said it to them.  "Does your mom love

you?" "Of course "they answered.

     "How do you know? "was my logical question. They responded that their mons cooked and

always told  them what they were doing wrong to show  their caring. I was stunned. So mon's cooking

and  criticzing read out as "I love you ".  "Then how do you say 'I love you 'to her?" They agreed that

getting  good grades, followed by god jobs would be how they showed their love.

     I come from a culture where most people are expressive enough, so I repeated these queries in

classes over time. Gradually, I began to get different response. Some of them had exchanged those

sentiments with their moms.

     One of my favorite stories of change came from a girl.  When she came home from university,

her mother met her at the door and hugged(拥抱)her. This had never happened before, but her mom

said,  "Now that you have gone I have more time to myself. I noticed that in some places mothers and

children   hug each other and I decided it was a good idea and that I would begin hugging you. "

     In my family we all say "I love you" a lot. While it is true that we often say the words without

having  great depth of feelings at that moment, it is almost like a blessing we give each other.  Those three

little words carry a world of meaning, even when said as a greeting, but most especially if they are the

last  words we say to or hear from those we love.

1. The foreign teacher_______.

A.  comes from America  

B.  is a young woman

C.  is expressive enough  

D.  knows much about China

2. Chinese people prefer to show love by________.

A.  saying "I love you"  

B.  cooking

C.  getting good grades  

D.  doing something helpful;

3. In paragraph 4, what's the real meaning of the mom's hugging?

A.  She is meeting her daughter at the door.

B.  She loves her daughter and misses her.

C.  She is glad that she has more time  to herself

D.  he finds it interesting to hug her daughter.

4. What's the main idea of the passage?

A.  Say "I love you"more to your family.

B.  Say "I love you "a lot to Chinese people .

C.  Say "I love you "as a greeting to others.

D.  Say "I love you "without great depth of feelings.