制定教育政策的程序包括（）
A.准备阶段
B.批准阶段
C.公布和阐明阶段
D.试行阶段
E.实施阶段
参考答案：A, B, C, E
—____ Tony's first school in London?
—No , it ____.[ ]
A. Was ; was
B. Were ; were
C. Was ; wasn't
D. Were ; weren't
将基因型为AaBbCc和AABbCc的向日葵杂交，按基因自由组合规律，后代中基因型为AABBCC的个体比例应为（）
A.1/8
B.1/6
C.1/32
D.1/64
