(每小题有A、B、C、D四个备选项，其中至少有1个符合题意) 某开发商需要对一个房地

A study released a little over a week ago, which found that eldest children end up, on average, with slightly higher IQ’s than younger siblings, was a reminder that the fight for serlfdefinition starts much earlier than freshman year. Families, whatever the relative intelligence of their members, often treat the firstborn as if he or she were the most academic, and the younger siblings fill in other niches: the wild one, the flirt.
These imposed caricatures, in combination with the other labels that accumulate from the sandbox through adolescence, can seem over time like a miserable cat. entourage of identities that can be silenced only with hours of therapy. But there’s another way to see these alternate identities: as challenges that can sharpen psychological skills. In a country where reinvention is considered a birthright, many people seem to treat old identities the way Houdini treated padlocked boxes: something to wriggle free from, before being dragged down. And psychological research suggests that this ability can be a sign of mental resilience, of taking control of your own story rather than being trapped by it.
The late-night bull sessions in college or at backyard barbecues are at some level like out-of-body experiences, allowing a re-coloring of past experience to connect with new acquaintances. A more obvious outlet to expand identity--and one that’s available to those who have not or cannot escape the family and community where they’re known and labeled —is the Internet. Admittedly, a lot of the role-playing on the Internet can have a deviant quality. But researchers have found that many people who play life-simulation games, for example, set up the kind of families they would like to have had, even script alternate versions of their own role in the family or in a peer group.
Decades ago the psychologist Erik Erickson conceived of middle age as a stage of life defined by a tension between stagnation and generativity-a healthy sense of guiding and nourishing the next generation, of helping the community. Ina series of studies, the Northwestern psychologist Dan P. McAdams has found that adults in their 40s and 50s whose lives show this generous quality - who often volunteer, who have a sense of accomplishment - tell very similar stories about how they came to be who they are. Whether they grew up in rural poverty or with views of Central Park, they told their life stories as series of redemptive lessons. When they failed a grade, they found a wonderful tutor, and later made the honor roll; when fired from a good job, they were forced to start their own business.
This similarity in narrative constructions most likely reflects some agency, a willful reshaping and re-imagining of the past that informs the present. These are people who, whether pegged as nerds or rebels or plodders, have taken control of the stories that form their identities.
In conversation, people are often willing to hand out thumbnail descriptions of themselves: "I’m kind of a hermit." Or a talker, a practical joker, a striver, a snob, a morning person. But they are more likely to wince when someone else describes them so authoritatively.
Maybe that’s because they have come too far, shaken off enough old labels already. Like escape artists with a lifetime’s experience slipping through chains, they don’t want or need any additional work. Because while most people can leave their family niches, schoolyard nicknames and high school reputations behind, they don’t ever entirely forget them.

The author mentioned Houdini in the text to

A．tell readers how he treated the padlocked boxes.

B．introduce the topic of. IQ differences between siblings.

C．illustrate the point that previous identities can be remade.

D．explain how to sharpen one’s psychological skills.

当前市售珍珠粉的价格从五元到上百元不等，但其外观、手感都没有明显差异．

那么优质珍珠粉和廉价珍珠粉的成分有何不同呢？就此问题，实验小组同学展开探究．

【查找资料】

①优质珍珠粉直接由贝科动物体内珍珠加工而成，含有一定量的氨基酸、碳酸钙等．

②廉价珍珠粉由“贝壳粉”加工而成，贝壳加工过程中会用到氢氧化钠，贝壳的主要成分是碳酸钙．

③珍珠粉中除碳酸钙外，其它成分均不能与盐酸反应生成二氧化碳．

④氨基酸大部分能溶解于水，遇到浓硝酸并加热会呈现黄色或黑色．

⑤碳酸钙与浓硝酸能发生反应，生成二氧化碳．

⑥氯化钙溶液呈中性．

【提出猜想】

优质珍珠粉和廉价珍珠粉的区别可能在于：

①廉价珍珠粉含有　                         ；

②廉价珍珠粉不含氨基酸；

③碳酸钙含量不同．

【实验探究】

（3）分别将一定质量的优质珍珠粉和廉价珍珠粉放入烧杯中，再逐滴加入14.6%的稀盐酸，边滴加边振荡，直至恰好完全反应．数据记录如下：

①处理数据时，小明提出了如下思路：用加入盐酸的质量乘以盐酸的质量分数，求出反应的盐酸中的溶质质量，进而利用化学方程式求出珍珠粉中碳酸钙的质量．你认为小明的思路是否可行，理由是　      ②处理数据后，得出结论：廉价珍珠粉中碳酸钙的质量分数为　　%（计算结果保留小数点后1位），含量高于优质珍珠粉．

【实验反思】

经过反思，同学们认为仍用上述试剂，只需略调整操作，就可以通过一次珍珠粉的取样完成三个猜想的验证．请写出调整后的作：                                                           ．

早期发现宫颈癌最简单而最重要的方法是

A．子宫颈黏液检查

B．诊断性刮宫

C．宫颈刮片检查

D．抗癌血清检查

E．超声检查

我国地形特点是______，而且山区面积广大，其在发展______、______和______等方面优势较大，部分山间盆地和河谷平原可以发展______业：但是，山区地面较为______，交通______，基础设施建设难度大．

主要用于治疗热证的是

A．井穴
B．荥穴
C．输穴
D．经穴
E．合穴