根据电力电力消费年平均增长率与国民经济增长率的比值进行电力需求预测的方法是（） A.

已知等比数列{a_n}的前n项和为S _n=3 ⁿ+m，且a₁=2

（Ⅰ）求实数m 的值及数列{a_n}通项公式；

（Ⅱ）若数列{b_n}满足b_n-a_n=n+6 （n∈N⁺），求数列{b_n}的前n项和T_n．

下列属于房屋及设施设备的种类和组成部分的是( )。

A．房屋的种类和基本组成部分

B．评价参考主要指标

C．使用管理

D．采购和零备件管理

氩弧焊焊接铝及铝合金是利用氩离子的______作用，去除熔池表面的氧化铝薄膜。

动物种群的跨物种研究表明，出生一个月就与母亲隔离的幼仔常常表现出很强的侵略性。例如，在觅食时好斗且拼抢争食，别的幼仔都退让了它还在争抢。解释这个现象的假说是，形成侵略性强的毛病是由于幼仔在初生阶段缺乏由父母引导的社会化训练。如果以下哪项陈述为真，能够最有力地加强上述论证？

A．早期与母亲隔离的羚羊在冲突中表现出极大的侵略性以确立其在种群中的优势地位。

B．在父母的社会化训练环境中长大的黑猩猩在交配冲突中的侵略性，比没有在这一环境中长大的黑猩猩弱得多。

C．出生头三个月被人领养的婴儿在童年时期常常表现得富有侵略性。

D．许多北极熊在争食冲突中的侵略性比交配冲突中的侵略性强。

Anthropology is the study of human beings as creatures of society. It (1) its attention upon those. physical characteristics and industrial techniques, those conventions and values, which (2) one community from all others that belong to a different tradition.

The distinguishing mark of anthropology among the social sciences is that it includes for serious study other societies (3) our own. For its purposes any social (4) of mating and reproduction is as significant as our own. To the anthropologist our customs and those of a New Guinea tribe are two possible social schemes for (5) a common problem, and in so far as he remains an anthropologist he is (6) to avoid any weighting of one (7) the other. He is interested in human behavior, not as it is shaped by one tradition, our own, but as it has been shaped by any tradition (8) He is interested in a wide (9) of custom that is found in various cultures, and his object is to understand the way in which these cultures change and (10) , the different forms through which they express themselves and the (11) in which the customs of any peoples function in the lives of the (12) .

Now custom has not been commonly regarded as a (13) of any great moment. The inner workings of our own brains we feel to be uniquely (14) of investigation, but custom, we have a way of thinking, is behavior at its most commonplace. (15) , it is the other way round. Traditional custom is a mass of detailed behavior more astonishing than (16) any one person can ever evolve in individual actions. Yet that is a rather (17) aspect of the matter. The fact (18) first rate importance is the predominant role that custom (19) in experience and belief, and the very great varieties it may (20)

5（）

A. meditating on

B. imposing on

C. tangling with

D. dealing with