一小儿身高85cm，前囟已闭，头围48cm，乳牙20枚，已会跳并能用简单的语言表达自

设曲线y=xⁿ⁺¹（n∈N^*）在点（1，1）处的切线与x轴的交点的横坐标为x_n，令a_n=lgx_n，则a₁+a₂+…+a₉₉的值为______．

根据短文内容，完成下列句子。

                                                                        Daniel's Day

     Daniel likes his school very much. He goes to school at seven twenty after breakfast. He has lessons

at eight ten. He's good at Maths. He loves English, too. He eats lunch at school at eleven forty. He does

after-school  activities at four  twenty in  the  afternoon. He  plays  football, badminton  and  volleyball.

Sometimes he swims. Daniel goes home at five o'clock. He eats dinner at six forty. Then at about seven

o'clock he watches TV. He likes watching TV because he wants to learn more about the world. At eight

he does his homework. He goes to bed at nine o'clock.

1. At seven twenty Daniel ________.

2. In the morning, Daniel begins his lessons ________.

3. Daniel eats ________ and ________ at home and he eats ________ at school.

4. Daniel likes ________ because he wants to learn more about the world.

5. At nine o'clock Daniel ________.

读等高线图，回答下列问题：（每空2分，共8分）

（1）D在E的      方，F点的海拔高度是     米

（2）C悬崖的相对高度最多不会超过          米。

（3）假设图中城市的海拔高度为400米，当城市温度为32℃时，山峰E的温度不会高于     。

获得 2009年度国家科技进步奖一等奖的“如意纺”技术，解决了世界纺织业 100多年来在原料长度、细度以及来源上存在的3大难题，它可以使用多种原料的“下脚料”纺出高品质的产品，使羽绒、木棉等原本不可纺的天然纤维成为纺织原料，井使生产成本降低 2.0％以上。材料表明，“如意纺”技术（    ） 

①作为生产要素，本身也是商品                      

②有利于企业提高经济效益

③可以促进产品结构升级换代，优化进出口商品结构    

④可以充分利用资源，实现可持续发展  

A．②③

B．①③

C．①④

D．②④

暑淫证候的表现是

A．头昏沉，嗜睡，胸脘痞闷
B．口渴饮水，口唇鼻咽干燥
C．发热恶热，汗出，气短神疲
D．突发皮肤瘙痒丘疹
E．肠鸣腹泻，脘腹拘急冷痛