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问题 选择题

被胆汁促进消化的物质是（　　）

A．淀粉

B．脂肪

C．蛋白质

D．维生素

答案

A、淀粉的消化需要淀粉酶，不是胆汁，故A不符合题意；

B、脂肪的消化需要胆汁将脂肪乳化成脂肪微粒，增加脂肪与消化酶的接触面积，有利于脂肪的消化，故B符合题意；

C、蛋白质的消化需要蛋白酶，不需胆汁，故C不符合题意；

D、维生素不需要消化，就可直接被吸收，不需胆汁，故D不符合题意．

故选：B

解答题

解下列方程．

3x-6=48

7x+1.5=19

3x-4×5=16

2x+0.73+0.27=2．
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补全对话，情景问答
交际运用，从方框中选择适当句子补全对话，其中有一项为多余选项。
A. I had a big meal with my friends.
B. I don't feel very well.
C. Of course not.
D. Nothing serious.
E. Certainly I won't.
F. I think you ate too much.
A: Good morning, doctor.
B: Good morning. Sit down, please. What's the matter with you?
A:    1    I have a stomachache.
B: What did you have for supper yesterday evening?
A:    2    We had different kinds of food.
B:    3   
A: Yes. Is it serious?
B: Don't worry.    4    Take this medicine three times a day after meals. Be careful not to eat meat and sea food
    these days.
A:    5   Thank you, doctor.
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