五种创造力理论中，（）理论的的主要观点是个人所拥有资源关系影响创造力的产生与展现。

读地球公转示意图，回答下列问题。

（1）在图中用箭头标出地球公转方向。

（2）当地球公转到C位置时，正值北半球的节气是________，日期为___________前后，此时阳光直射在

    __________（纬线名称）上。

（3）当地球公转到A位置时，南极圈及其以南地区出现_____现象，龙文区的昼夜长短情况是________。

（4）我国航天员杨利伟于2005年10月15日乘坐载人航天飞船首飞成功。当时在绕太阳公转的轨道上，地

    球大致运行在图中的______（区间范围）。[ ]

    A．AC之间

    B．CB之间

    C．BD之间

    D．DA之间

依法必须招标的工程建设项目，按照工程建设项目审批管理规定，凡应报送项目审批部门的，必须在报送项目( )中增加有关招标的内容。

A．投资机会研究报告
B．建议书
C．初步可行性研究报告
D．可行性报告

图18-2-20所示单元体按第三强度理论的相当应力为（）。

A．σxd₃=94MPa

B．σxd₃=0

C．σxd₃=60MPa

D．σxd₃=16MPa

Another critical factor that plays a part in susceptibility to colds is age. A study done by the University of Michigan School of Public Health revealed particulars that seem to hold true for the general population. Infants are the most cold-ridden group, averaging more than six colds in their first year. Boys have more colds than girls up to age three. After the age of three, girls are more susceptible than boys, and teenage girls average three colds a year to boys’ two.
The general incidence of colds continues to decline into maturity. Elderly people who are in good health have as few as one or two colds annually. One exception is found among people in their twenties, especially women, who show a rise in cold infections, because people in this age group are most likely to have young children. Adults who delay having children until their thirties and forties experience the same sudden increase in cold infections.
The study also found that economics plays an important role. As income increases, the frequency at which colds are reported in the family decreases. Families with the lowest income suffer about a third more colds than families at the upper end. Lower income generally forces people to live in more cramped quarters than those typically occupied by wealthier people, and crowding increases the opportunities for the cold virus to travel from person to person. Low income may also adversely influence diet. The degree to which poor nutrition affects susceptibility to colds is not yet clearly established, but an inadequate diet is suspected of lowering resistance generally.

Which of the following conclusions does information in Paragraph 2 support

A．Men are more susceptible to colds than women.
B．Women having babies are more susceptible to colds.
C．People who live in a cold climate have more colds than those who live in a warm one.
D．People who don’t have children are more susceptible to colds than those who do in their thirties or forties.

对倾斜井巷上端的过卷距离有何规定？