科学是技术发展的理论基础，技术是科学发展的（），它们相互依存、相互渗透、相互转化。

正n边形的一个外角等于20°，则n=______．

某女，23岁。产后突发大失血，见面色苍白，四肢厥冷，大汗淋漓，舌淡，脉芤。为

A．气血两虚证

B．气不摄血证

C．气随血脱证

D．气虚血瘀证

E．气滞血瘀证

细脉的脉象特征是（）

A．浮而细软

B．极细极软，按之欲绝

C．脉细如线，应指清晰

D．极软而沉细

What can be concluded from the passage

A．Medical tests and education for Americans with diabetes are not covered by the present healthcare schemes.

B．If you are 20 years old or more, you are more likely to suffer from diabetes.

C．Family help is the more important and most effective in detecting and treating diabetes.

D．In the US, July 1 is a day of celebration for hospital staff, nurses and patients.