屏气试验是粗略测定心功能的简单方法，正常人可持续多少秒（s）以上（）
A.10s
B.30s
C.40s
D.50s
E.60s
参考答案：B
In relation to agency law, explain:
(a) the legal consequences when an agent exceeds his authority; (7 marks)
当下我国科技进步正处在由以往原始性自主创新与引进发达国家尖端技术相结合的阶段转向依赖技术引进与仿制为主的阶段。
