反比例函数y=（2k+1）xk2-2在每个象限内y随x的增大而增大，则k=___

在春天，河水边上的湿地是松软的，人在这些湿地上行走时很容易下陷，此时(    )

A．人对湿地地面的压力大于湿地地面对他的支持力

B．人对湿地地面的压力等于湿地地面对他的支持力

C．人对湿地地面的压力小于湿地地面对他的支持力

D．无法确定

单词拼写：（共10小题，每小题0.5分，满分5分）

66. Between Italy and France, there is a mountain r________ called the Alps.

67. Considering size and population, how big is the European Union c__________ with China?

68. A tornado is a r__________ column of air from a thunderstorm to the ground.

69. What c________ the terrible fire? It was a burning cigarette end.

70. Oxford and Grenoble are both m_________-sized towns of between 100,000 and 200,000 inhabitants.

71. The countries are independent and are ___________(统治)in different ways.

72. Paris is the capital and largest city of France, __________ (位于)on the River Seine.

73. The human development index has some _______________.(令人意外的事情)

74. In nine years, China increased life __________(寿命)by 13 years.

75. There was the ____________(可能；可能性) of a huge tidal wave which could flood half the island.

某建设项目的现金流量见表2-1，已知基准折现率为10%，则该项目的财务净现值及动态投资回收期为( )。 表2-1

A．年序

B．1

C．2

D．3

E．4

F．5

G．6

H．净现金流量/万元

I．-200

J．60

K．60

L．60

M．60

N．60

计算题：试计算CO浓度为80mg/m³，相当于多少ppm。（标准状态下1mol气体体积为22.4升）

在PID图中，用（）画出装置全部操作和备用的设备。

A、虚线

B、粗实线

C、细实线

D、点划线