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问题 单项选择题 A1/A2型题

配制胰蛋白酶溶液应选用（）。

A.含Mg2+的平衡盐溶液

B.含Ca2+、Mg2+的平衡盐溶液

C.含Ca2+的平衡盐溶液

D.不含Ca2+、Mg2+的平衡盐溶液

E.含Ca2+、Mg2+和血清的平衡盐溶液

答案

参考答案：D

补全对话，情景问答
从方框中选出能填入空白处的最佳选项补全对话。(有一项是多余的)
A. Do you have a fever?
B. I'm not feeling well.
C. But you'd better go to see a doctor.
D. How long have you been like this?
E. Could you please go with me?
F. Maybe you've just had a cold.
A: Hi, Kate, you look so worried. What's the matter?
B: 1.           I've got a headache, a running nose and a sore throat. You know the A-H1N1 virus (病毒)
    is so scary. I am afraid…
A: 2.           
B: No, I don't. I took my temperature just now.
A: Don't worry. A fever is the common symptom (症状) of the disease 3.          
B: I hope so.
A: 4.           You can get Some advice.
B: That's a good idea. 5.           
A: Sure. Let's go.
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单项选择题

氧化供能，构成生物膜的主要成分的营养物质是

A．蛋白质

B．糖

C．维生素

D．必需脂肪酸

E．脂类
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