活髓牙钉洞同位型要求钉洞的深度一般为（） A.0.5mm B.1mm C.1.5mm

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Reading is an activity that people enjoy a lot in their free time.

Some like reading newspapers and o___小题1:__ enjoy novels or comic(喜剧的)books. My f__小题2:___ books are those about the lives of great people. Reading them always gives me a lot of ideas on how to make my o___小题3:___ life better.

Great people are remembered not because they were handsome or beautiful, but because they did not give up w___小题4:___ their lives were difficult. They tried to use e___小题5:___ chance to change their lives and make the world better.

One good example is Orville and Wilbur Wright, the two brothers who invented the airplane. The plane has m___小题6:____ the world a small village. Hard work, not good luck, is the r___小题7:___ why the Wright Brothers could invent this convenient(方便的)machine and become great people. Today we will remember them when we see planes f___小题8:____ in the sky.

Whenever I read s___小题9:___ about great people, I always learn a lot from them and they encourage me to march on.

This is w___小题10:___ I enjoy reading about great people’s lives.

重商主义产生于西欧的(　　　)

A．封建社会瓦解和资本的原始积累时期

B．中世纪晚期

C．资本主义机器大生产时期

D．资本主义私人垄断时期

通常情况下，在小区重选准则C2的算法中，有一个参数TEMPORARY OFFSET。其对C2值的影响是（）。

A.给C2值加一个正的临时偏置

B.给C2值加一个负的临时偏置

C.不影响C2的值

D.给C2值加一个固定偏置

2011年2月15日，甲地某鞋厂向乙地某商场以信件形式邮寄要约：××牌运动鞋1000双，每双100元，货到付款。2月19日，商场收到后即给鞋厂发送传真：需要400双，尽快发货。鞋厂未回复此传真，而于2月23日直接发货400双，商场于2月25日收到，并付款。下列关于本案中合同成立的时间和地点的表述正确的是：

A．合同成立时间为2月19日，合同成立的地点为甲地
B．合同成立时间为2月19日，合同成立的地点为乙地
C．合同成立时间为2月23日，合同成立的地点为甲地
D．合同成立时间为2月25日，合同成立的地点为乙地

粘度的定义是什么？什么叫绝对粘度？什么叫相对粘度？