检测直放站或其他有源设备的指标有（）。A.噪声系数 B.接收电平 C.输出功率 D.

特殊情况下工资的种类及其支付的标准是怎样规定的？

     In 1997, a group of twenty British women made history. Working in five teams with four women in

each team, they walked to the North Pole. Apart from one experienced female guide, the other women

were all ordinary people who had never done anything like this in their lives before. They managed to

survive in an environment which had defeated several very experienced men during the same time period.

     The women set off as soon as they were ready. Once on the ice, each woman had to ski along while

dragging a sledge (雪橇) weighing over 50 kilos. This would not have been too bad on a smooth surface, but for long distances, the Arctic ice is pushed up into huge piles two or three metres high, and the sledges had to be pulled up one side and carefully let down the other so that they didn’t become damaged. The

temperature was always below the freezing point and sometimes strong winds made walking while pulling

so much weight almost impossible. It was also very difficult for them to put up their tents when they

stopped each night.

     In such conditions, the women were making good progress if they covered fourteen or fifteen

kilometres a day. But there was another problem. Part of the journey was across a frozen sea with moving water underneath the ice and at some points the team would drift (漂流) back more than five kilometres

during the night. That meant that after walking in these very severe conditions for ten hours on one day,

they had to spend part of the next day covering the same ground again. Furthermore, each day it took

three hours from waking up to setting off and another three hours every evening to set up the camp and

prepare the evening meal.

     So, how did they manage to succeed? They realized that they were part of a team. If any one of them

didn't pull her sledge or get her job done, she would endanger the success of the whole expedition (探险). Any form of selfishness could result in the efforts of everyone else being completely wasted, so personal

feelings had to be put to one side. At the end of their journey, the women agreed that it was mental effort

far more than physical fitness that got them to the North Pole.

1. What was so extraordinary about the expedition?

A. There was no one to lead it.

B. The women did not have any men with them.

C. It was a new experience for most of the women.

D. The women had not met one another before.

2. On the expedition, the women had to be careful to avoid ________.

A. falling over on the ice          

B. being left behind

C. damaging the sledges              

D. getting too cold at night

3. It was difficult for the women to cover 15 kilometres a day because ________.

A. they got too tired                

B. the ice was moving

C. they kept getting lost            

D. the temperatures were too low

女，4个月龄。患儿出生后不久手足出现水疱，以关节和摩擦部位为著，摩擦后加重。患儿出生正常。母孕期无感染及服药史，父母非近亲结婚。家族中无类似疾病。体检：生长发育良好，生命体征正常，头颅及耳鼻检查无异常，颈无抵抗，心、肺、腹部检查无异常，口唇周围及手足皮肤可见大小不等透亮水疱，直径约1～2cm。该病透射电镜下皮肤松解发生于表皮基底细胞下部。

该病属于遗传性大疱性表皮松解症(EB)的哪一类型

A．单纯型EBS
B．交界型EBC
C．半桥粒型EBD
D．常染色体显性遗传的DEB
E．常染色体隐性遗传的DEB

数据库维护阶段的故障维护工作是指( )。

A．排除设备故障

B．恢复遭到破坏的数据库

C．修改不适当的库结构

D．修改应用程序

危险化学品库区内可因装卸作业需要搭建临时建（构）物。