兴奋剂是常见的致瘾药物，下面属于兴奋剂的是________。 A．可卡因 B．咖啡因

In my children’s lifetimes, I believe gorillas, chimpanzees and orangutans will all become extinct in the wild. So the question we have to ask ourselves is this: do we want our children to see only in zoos what used to exist in the real world (46) It is the great apes that will disappear first, because there are so few of them left, and because they’re so vulnerable to changes in their habitats.

Many of the threats to these animals result from a global economy not local pressures. The threat to the orangutan in Indonesia, for example, is largely a result of deforestation and the risks to primates in Africa result from the timber-trade and the demand for bush-meat. (47) The two work together: logging opens up the forest, which means that the bush-meat can be got out fast, to Kinshasa or to London.

(48) If we want to avoid the disaster scenario, people in developed countries will have to take a global perspective and accept responsibility for the damage export crops such as timber, coffee, cut flowers or even green beans, do to the environment. The challenge is to avoid simply imposing western attitudes on local peoples.

Already there are no truly wild places left in the world. (49) Looking at wildlife has become the preserve of the middle classes over the last twenty-odd years, and as wild animals become even rarer, so more tourists want to see them. But tour ism alone plainly cannot conserve the world’s animals; economic development is the priority.

For the future, I suspect that ff you really want to do something about wild life conservation, you would be better off putting your money into women’s education rather than just into the protection of flagship species. (50) Women often bear the direct costs of wildlife conflict; their knowledge of how to deal with conflict and how to control their own reproductive destinies may yet determine the survival of many threatened species.

Women often bear the direct costs of wildlife conflict; their knowledge of how to deal with conflict and how to control their own reproductive destinies may yet determine the survival of many threatened species.

在超市里，张某请求一名陌生人帮自己看管一下刚刚购买的商品，当对方同意之后，又向对方提出帮自己把商品提上车的请求。张某在超市中使用的这种增加他人顺从的技巧，称为()。

A.“门前技巧” 

B.“滚雪球” 

C.“折扣技巧” 

D.“脚在门槛内技巧”

类人猿和其后的史前人类所使用的工具很相似。最近在东部非洲考古所发现的古代工具，就属于史前人类和类人猿都使用过的类型。但是，发现这些工具的地方是热带大草原，热带大草原有史前人类居住过，而类人猿只生活在森林中。因此，这些被发现的古代工具是史前人类而不是类人猿使用过的。
为使上述论证有说服力，以下哪项是必须假设的

A．即使在相当长的环境生态变化过程中，森林也不会演变为草原。
B．史前人类从未在森林中生活过。
C．史前人类比类人猿更能熟练地使用工具。
D．史前人类在迁移时并不携带工具。
E．类人猿只能使用工具，并不能制造工具。

有关高钙危象，下列说法正确的是（）

A.甲旁亢患者血清钙>3.75mg／L时称高钙危象

B.甲旁亢患者血清钙>4.00mg／L时称高钙危象

C.皮下或肌内注射降钙素

D.加用林格注射液治疗

E.紧急处理高钙危象时，大量滴注生理盐水，根据失水情况每天给4～6L

女，32岁，退役运动员。逐渐出现持续腰痛并双下肢痛，卧床休息时缓解，活动时加重。近1个月出现大小便功能障碍。患者感向前弯腰困难，难以双手触及地面。体格检查；腰椎前凸增加，腰₄与腰₅棘突间有明显的台阶感，腰椎前屈受限，腰背肌痉挛。

该患者发病部位最可能位于

A．腰_4/5节段

B．腰₅/骶₁节段

C．腰_3/4节段

D．腰_2/3节段

E．腰_1/2节段