用数字0，1，2，3，4，5可以组成没有重复数字并且比20，000大的五位偶数共有（)。
A．288个
B．240个
C．144个
D．126个
E．122个

烟斗和雪茄比香烟对健康的危害明显要小。吸香烟的人如果戒烟的话，则可以免除对健康的危害，但是如果改吸烟斗或雪茄的话，对健康的危害和以前差不多。如果上述断定为真，则以下哪项断定最不可能为真？
A．香烟对所有吸香烟者健康的危害基本相同。
B．烟斗和雪茄对所有吸烟斗和雪茄者健康的危害基本相同。
C．同时吸香烟、烟斗和雪茄所受到的健康危害，不大于只吸香烟。
D．吸烟斗和雪茄的人戒烟后如果改吸香烟，则所受到的健康危害比以前大。
E．烟斗比雪茄对健康的危害要大。

尽管幼儿园老师反复叮咛，我的孩子总难以养成临睡前刷牙的习惯。我做出样子，希望她能够模仿；我给她讲道理，临睡前刷牙甚至比清晨更重要，但总难以奏效。后来，我在她临睡前给她讲一个故事，并要求她听故事前去刷牙。几周后，每天晚上临睡前，只要我一拿起故事书，她就会立即去刷牙。以下哪项是对上述家长经验的最恰当概括？
A．喜欢听故事是幼儿的天性，家长应学会运用这一点对孩子进行有益的诱导。
B．家长在教育幼儿方面比幼儿园老师更有效，是因为他们对孩子更具爱心。
C．榜样比说教对幼儿更有效。
D．孩子的习惯是靠重复某个行为养成的，即使她并不理解这一行为的意义。
E．幼儿更愿意去模仿大人的行为，而不愿意听从大人的要求。

如图1所示，在高楼前D点测得楼顶的仰角为30°，向高楼前进60米到C点，又测得仰角为45°，则该高楼的高度大约为（)。

A．82米
B．123米
C．163米
D．52米
E．70米

One of the questions that is coming into focus as we face growing scarcity of resources of many kinds in the world is how to divide limited resources among countries. In the international development community, the conventional wisdom has been that the 2 billion people living in poor countries could never expect to reach the standard of living that most of us in North America enjoy, simply because the world does not contain enough iron ore, protein, petroleum, and so on. At the same time, we in the United States have continued to pursue super affluence as though there were no limits on how much we could consume. We make up 6 percent of the world's people; yet we consume one-third of the world's resources.
As long as the resources we consumed each year came primarily from within our own boundaries, this was largely an internal matter. But as our resources come more and more from the outside world, "outsiders" are going to have some say over the rate at which and terms under which we consume. We will no longer be able to think in terms of "our" resources and "their" resources, but only of common resources.
As Americans consuming such a disproportionate share of the world's resources, we have to question whether or not we can continue our pursuit of super affluence in a world of scarcity. We are now reaching the point where we must carefully examine' the presumed link between our level of well-being and the level of material goods consumed. If you have only one crust of bread and get another crust of bread, your well-being is greatly enhanced. But if you have a loaf of bread, then an additional crust of bread doesn't make that much difference. In the eyes of most of the world today, Americans have their loaf of bread and are asking for still more. People elsewhere are beginning to ask why. This is the question we're going to have to answer, whether we're trying to persuade countries to step up their exports of oil to us or trying to convince them that we ought to be permitted to maintain our share of the world fish catch.
The prospect of a scarcity of, and competition for, the world's resources requires that we reexamine the way in which we relate to the rest of the world. It means we find ways of cutting back on resource consumption that is dependent on the resources and cooperation of other countries. We cannot expect people in these countries to concern themselves with our worsening energy and food shortages unless we demonstrate some concern for the hunger, illiteracy and disease that are diminishing life for them.
The writer warns Americans that ______.
A．their excessive consumption has caused world resource exhaustion
B．they are confronted with the problem of how to obtain more material goods
C．their unfair share of the world's resources should give way to proper division among countries
D．they have to discard their cars for lack of fossil fuel in the world

根据最近一项跨文化的研究，已婚人口通常比离婚且没有再婚的人寿命长。这一事实表明与离婚相关的压力对健康有不利影响。下面哪个，如果正确，指出了以上论述的一处缺陷？
A．人的寿命因国家而异，即使文化相似的国家也是这样。
B．离婚时，人们总会表现出一种压力。
C．即使是已婚人，寿命也是随着年龄层的不同而不同。
D．许多压力都对健康有不利影响。
E．从未结过婚的成年人的寿命比同龄的已婚人的寿命短。