正确答案: A
题目:决定我国现阶段发展多种所有制经济的根本原因是( )
解析:A【解析】“A”、“B”、“C”是实行多种所有制经济并存的原因,但其根本原因是生产力水平低而且发展不平衡,故选“A”;“D”不属于原因。
举一反三的答案和解析:
47.答案为B 根据第二段的前两句We believe,however,that some two thousand million years ago,another star wandering through space,happened to come near our sun.Just as the sun and the moon raise tides on the earth,so this star must have raised tides on the surface of the sun...和生活常识可知潮汐是由于星球接近时造成的引力而产生,因此选B。
7.答案为A 他建议坐火车去那。suggest的宾语从句需用虚拟语气,(should)+动词原形,因此选A。