动力监控系统中传感器的作用是（）。

设k∈R，若x＞0时均有 （kx-1）[x²-（k+1）x-1]≥0成立，则k=______．

第二节 根据对话内容从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Doctor: Hello, Mike, how can I help you?

Mike: I feel very ill, doctor．Can you give me something for the pain?   

Doctor: Now let’s see．     61     

Mike: Yes, I have．It was 40 when I took it this morning．

Doctor: That’s quite high．Do you have a stomachache?

Mike:     62      And I don’t feel sick．

Doctor: Does your chest feel painful?

Mike: Yes．

Doctor: Ok．Then I’ll use a different drug．And I’ll give you an X-ray．

Mike: Oh, I don’t want an X-ray．

Doctor: Oh dear!      63      An X-ray won’t hurt you．

Mike: Well, I don’t want an X-ray．

Doctor:      64    ．Does it hurt when you cough?

Mike: Yes, it does．

Doctor: Take some deep breathe．Say “Aaah”．

Mike: Aaah．

Doctor: I think we’ll put you on a special diet for a few days．No unhealthy fats and sugars．Only good, natural, healthy food for you．

Mike:      65      I’m sure I won’t keep to it because I love sweets．

Doctor: Yes, but you want to get better, don’t you?

Mike: OK．I’ll try it．

A．Why not?

B．Oh dear．

C．Let me examine you．

D．Have you got a temperature?E．Is it serious?

F．What’s the matter with you?

G．No, not really．

下列说法错误的是（     ）

A．水华．赤潮．潮汐都是水体富营养化导致的

B．蔬菜．水果类大多为碱性食物，而肉类大多为酸性食物

C．绝大多数食品添加剂在过量使用时对人体是有害的

D．食盐加碘是防止人体缺碘而加的营养强化剂，能预防地方性甲状腺肿

患者男性，48岁。重症胰腺炎，出现神志昏迷，肢端发绀，尿约15ml/h。

为明确昏迷原因，应做的检查有（）

A.血糖

B.动脉血气

C.脑电图

D.尿常规

E.血氨

F.血电解质

用直条长短表达数值大小的图为（）

A.条图

B.箱式图

C.线图

D.半对数线图

E.百分条图