玉米种子纵剖面被碘液染成蓝色的部分是（　　）

小朋友可以不爱自己的家人。

设等比数列{a_n}满足a₁+a₃=10，a₂+a₄=5，则a₁a₂…a_n的最大值为（   ）

先通读下面短文，掌握大意，然后从下面四个答案中选择可以填入相应空白处的最佳答案。
Li Hua is thirteen years old. He’s a   【小题1】 . He’s the only child in the family. He doesn’t   【小题2】 his things.
One morning when the students of Class Two are   【小题3】 an English class, Li Hua goes to the door and says, “   【小题4】  I come in, Mr. Wang ?”
“Oh, you are  【小题5】 again,” says the teacher, “Can you tell me why you are late ?”
“My grandma  【小题6】 some apples, bananas and bread in my schoolbag this morning. I take the schoolbag with me after I have【小题7】. But   【小题8】 my way to school, I find there are no  【小题9】 in my schoolbag. I have to  【小题10】 and take them.”

【小题11】	A．teacher B．girl C．student D．children
【小题12】	A．look at B．look like C．look for D．look after
【小题13】	A．having B．singing C．reading D．working
【小题14】	A．May B．Should C．Must D．Will
【小题15】	A．early B．right C．late D．busy
【小题16】	A．gives B．puts C．takes D．gets
【小题17】	A．breakfast B．lunch C．supper D．bread
【小题18】	A．in B．at C．for D．on
【小题19】	A．oranges B．water C．books D．pears
【小题20】	A．get back B．return home C．go to school D．come back

若x²+x﹣1的值为0，则代数式x³+2x²+2007的值为____．