藻类植物     ____   a、体内有输导组织，能产生种子并用种子繁殖

苔藓植物     ____  b、没有根、茎、叶等器官的分化

蕨类植物     ____  c、植株矮小，茎和叶内没有输导组织

种子植物     ____  d、具有根、茎、叶，体内有输导组织

    This is Kate Smith. She is 13 years old. She lives in Guangzhou. She studies in No.10 Middle school. Her parents work there. They are both English teachers. They are form the UK. She likes eating junk food. She doesn't like playing sports. She has one healthy habit: She sleeps for 9 hours every night.
    Kate Smith has a brother. His name is Jack Smith. He is 11 years old. He doesn't eat junk food. He likes playing sports. He often runs, plays basketball, and goes swimming. He eats fruit every day. He likes eating vegetables. But he has an unhealthy habit: He sleeps for 6 hours every night.

习惯上把党在社会主义初级阶段的基本路线概括为“一个中心，两个基本点”，这里的“一个中心”是指（    ）

把二次函数y=3x²的图象向左平移2个单位,再向上平移1个单位,所得到的图象对应的二次函数关系式为(   )

下列物质中，属于有机合成材料的是（  ）