在数列{an}中，a1=35，a2=31100且数列{an+1-110an}是公

Oriole’s Nest

Picky, Picky

Scientists have no idea exactly why birds choose certain objects to build their nests. But scientists know that the main reason birds build nests is to keep their babies safe, warm and healthy.

Baby birds grow faster and are healthier when they are warm. They also learn to fly and leave the nests sooner than birds without warm homes.

What A Yarn (纱)

Yarn is big on an oriole’s shopping list during nest building. Scientists are still trying to work out why so many birds choose white yarn over other colors for nest building.

Scientists think that the white objects remind birds of cotton fluff (绒毛) they find in the wild.

Do It Naturally  

Even though birds can help us recycle some of our junk by using it to build nests, they also need to use lots of natural things. Long grass, dried sticks, spider’s silk and mud are some of the natural ingredients that are good for nests, too.

You can make a collection box of things to leave for birds so they can help themselves. Hang a small plastic box with holes on a tree branch. Fill the box freely with nest building goodies. Hang the box on a tree and watch birds climb on board to pick through the junk to find their treasures.

Warning: Don’t let the birds turn into a tasty treat. Keep your bird station away from places where cats hang out.

For The Birds!

Stop! Don’t throw all that garbage out! Give some to the birds. Look and see how your old junk can help beautify and warm a bird’s new home.

小题1:The baby birds with warm homes are able to _____.

A．choose right objects

B．leave the nests sooner

C．build good nests

D．learn to fly higher小题2: What can people make for birds to build nests?

A．Holes on the tree.

B．Food out of the rubbish.

C．A warning board.

D．A collection box of things.小题3:What can we learn from the passage?

A．Birds build nests to store things.

B．Birds regard white objects as cotton.

C．Birds and humans can help each other.

D．Birds and cats fight against each other.

山药丸中含有（）

A.士的宁

B.二萜类

C.硫化汞

D.硫化砷

E.乌头碱

某机械厂生产某种零件，经二道工序制成，某月份投1000件(原材料在生产开始时一次投入)，完工产品800件，企业月末账面保留的在产品成本2000元，该企业在产品成本的计算采用“约当产量法”，有关资料如下：

表1：在产品盘存表 工序 工时定额 在产品盘存数(件) 1 15 100 2 25 200 合计 40 300

表2：生产费用资料表 　　　　　单位：元 成本项目 月初在产品成本 本月发生费用 原材料 100000 800000 工资及附加 20000 100000 其他 10000 60000

根据上述资料回答下列问题(每一小步计算请保留两位小数，再进行下步计算)。

月末在产品应分摊的工资费用为( )。

A．32727元

B．20260.5元

C．19607.81元

D．11063.81元

TOC的国家分析方法标准为（）排除。

A.分光光度法

B.原子吸收法

C.非分散红外吸收

D.紫外吸收法

以下选项中，对维持健康的夫妻关系没有好处的是（）

A、平等相处、互敬互爱

B、宽容忍让、信任尊重

C、妒忌猜疑、虚荣怯懦

D、建立和谐的性生活