打破学科逻辑组织的界限,以学生的兴趣、动机、需要和能力为基础,以学生的经验为中心组织实施的课程是()
A.学科课程
B.活动课程
C.国家科学
D.核心课程
参考答案:B
保险产生、存在和发展的前提条件与客观依据是()。
A.风险因素
B.保险费率
C.消费者的货币收入
D.经济制度
What is the basic principle of the magnetic compass().
A.Magnetic materials of the same polarity repel each other and those of opposite polarity attract
B.The Earth's magnetic lines of force are parallel to the surface of the Earth
C.Magnetic meridians connect points of equal magnetic variation
D.The compass needle(s)will,when properly compensated,lie parallel to the isogonic lines of the Earth