亚甲蓝是上述哪类化学污染物的特效解毒剂（）。 A.有机磷 B.亚硝酸钠 C.镉 D.

某男，35岁，因反复腹泻，黏液血便1年半而入院。1年半前出现间歇性腹泻，每日数次，便量中等、腥臭，黏液血便，伴腹胀、轻度腹痛，间歇期大便基本正常。查体：T37．2℃，慢性病容，左下腹部有轻微压痛，肝肋下2cm，质中等，无触痛，肠鸣音正常。血常规：血色素92g／L，白细胞7．0乘以十的九次方／L，中性粒细胞0．70，淋巴细胞0．30。

若病人患有视神经炎，应禁用的药物是（）

A.甲硝唑

B.依米丁

C.氯喹

D.双碘喹啉

E.替硝唑

患者女，16岁，因“颈部增粗1个月”来诊。无怕热、多汗、心悸、消瘦等，无呼吸困难，食欲可。查体：T36.4℃，P70次/min，R16次/min，BP120/80mmHg；甲状腺Ⅱ度肿大，边界清楚，表面光滑，质软，无压痛，未闻及血管杂音；HR70次/min，律齐，各瓣膜听诊区未闻及病理性杂音；双手平伸未见细震颤。

该患者的治疗原则为（）。

A.可适当补碘

B.可试用优甲乐治疗

C.监测FT₃、FT₄、TSH水平

D.行甲状腺大部切除术

E.应用免疫调节剂

F.甲状腺¹³¹I治疗

阅读理解。

     Believe it or not, optical illusion (错觉) can cut highway crashes.

     Japan is a case in point. It has reduced automobile crashes on some roads by nearly 75 percent using

a simple optical illusion. But stripes, called chevrons (人字形), painted on the roads make drivers think

that they are driving faster than they really are, and thus drivers slow down.

     Now the American Automobile Association Foundation (基金会) for Traffic Safety in Washington

D.C. is planning to repeat Japan's success. Starting next year, the foundation will paint chevrons and

other patterns of stripes on selected roads around the country to test how well the patterns reduce

highway crashes.

     Excessive (too great) speed plays a major role in as much as one fifth of all fatal traffic accidents,

according to the foundation. To help reduce those accidents, the foundation will conduct its tests in areas

where speed-related hazards are the greatest curves, exit slopes, traffic circles, and bridges.

     Some studies suggest that straight, horizontal bars painted across roads can initially cut the average

speed of drivers in half. However, traffic often returns to full speed within months as drivers become used

to seeing the painted bars.

     Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane appear to be narrower. The result is a longer lasting reduction in highway speed

and the number of traffic accidents.

1. The passage mainly discusses ________. 

A. a new way of highway speed control

B. a new pattern for painting highways

C. a new way of training drivers

D. a new type of optical illusion

2. The underlined word "hazards" probably means ________.

A. accidents    

B. traffic jams      

C. dangers      

D. cases

3. The advantage of chevrons over straight, horizontal bars is that the former ________.  

A. can keep drivers awake      

B. can cut road accidents in half 

C. will look more attractive    

D. will have a longer effect on drivers

18世纪中期，维也纳一位医生发现。用磁石按摩人的身体，很容易让人进入催眠状态，当时称这类方法为（）。

A、催眠

B、催眠术

C、弗洛伊德术

D、麦斯麦术

以下关于数据的抽样方法的说法错误的是（）

A.简单随机抽样，随便从总体中抽取样本

B.比例分配抽样，样本按各分层总体数的多少比例分配抽样

C.适度分配抽样，波动程度大的分层多抽样，波动程度小的层少抽样

D.经济分配抽样，抽样费用高的层少抽样，抽样费用低的层多抽样