从圆(x－1)2＋(y－1)2＝1外一点P(2，3)向这个圆引切线，则切线长为_

  Come to this great store and have a look. Here are some interesting things.

Card game This is an interesting card game. It can bring you lots of fun. Price: $9	Big Ben clock Do you know the Big Ben in London? Here you can buy a Big Ben clock and put it on your desk. Price: $15
Bus money box Is it a toy bus? Yes, and you can put your money in it. Price: $6	Bus pencil sharpener This red bus is really a pencil sharpener. You can take it to school in your backpack. Price: $3

小题1:How much is the Big Ben clock?

A．$9.

B．$15.

C．$6.

D．$3.小题2: Where can you put your money?

A．In a card box.

B．In the Big Ben clock.

C．In the bus money box.

D．In the bus pencil sharpener.小题3:What’s the red bus in the passage?

A．A toy.

B．A clock.

C．A bus.

D．A pencil sharpener.

马克思主义哲学认为：“世界的真正统一性在于它的物质性。”据此回答1～2题。

1．下列属于物质的是[ ]

①影子　②抗震救灾精神　③青藏铁路上飞驰的列车　 ④辩证唯物主义和历史唯物主义

A．①②

B．①③

C．②③

D．②④

2．下列能够说明材料中观点的是[ ]

①自然界是物质的　②人类社会具有客观物质性 ③意识是社会的产物　④意识的内容和形式都是客观的

A．①②③

B．①②④

C．①③④

D．②③④

杭州工伤保险缴费主体是谁？

国际贸易

在ADSL线路安装时，入户线应使用（）。