Thousands of years (21) humans began the process of domesticating the dog and shaping what "being a dog" really means. Through careful selection and breeding, an astonishing variety of dog breeds (22) been created. Desirable traits have been selected for in various breeds that are of a benefit (23) humans. There are some traits, however, that quickly become undesirable when expressed too frequently. Barking is a(an) (24) of a natural behavior that is encouraged in terms of guarding behavior, but becomes a problem when the behavior is produced in excess. A recent health insurance investigation revealed (25) the sound of a continually barking dog was cited as the most disruptive and stress inducing (26) for humans.
Barking, in addition to whining, howling and growling, is a dog’s (27) means of communication. Barking is characterized by a series of short, sharp sounds, that tend to vary (28) <
A. powerful
B. natural
C. friendly
D. hostile

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[单选题]以下不是水泥土搅拌桩地基的施工质量控制点的是( )。
A.水泥及外加剂质量
B.水泥用量
C.桩体强度
D.顶面平整度

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[单选题]避雷器是用于一种限制()的主要保护设备。
A.过电流
B.过电压
C. 过负荷
D.过热

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[填空题]

A. separateD. unlessG. birthJ. clearly M. intelligence
B. stimulatedE. whenH. improved K. demonstrated N. capable
C. smartF. fullyI. environment L. similar O. college
There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born with. Human brains differ considerably, some being more (1) than others. But no matter how good a brain he has to begin with, an individual will have a low order of intelligence (2) he has opportunities to learn. So the second factor is what happens to the individual—the sort of (3) in which he is reared.
The importance of environment in determining an individual’s intelligence can be (4) by the case history of the identical twins, Peter and Mark. Being identical, the twins had identical brains at (5) , and their growth processes were the same. When the twins were three months old, their parents died, and

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[判断题]维护统治秩序与惩罚犯罪的客观需要，是警察产生的社会条件。

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[判断题]厂家使用的调试钥匙除防误装置专责人外，不得交给现场其他人员使用。
A.正确
B.错误

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[单选题]以下不属于公募基金的特征的是（）。
A.基金募集对象不固定
B.投资金额要求高
C.适宜中小投资者参与
D.必须接受监管部门的严格监管

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[简答题]简述免疫固定电泳的原理。

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[单选题]铺设道岔时,若轨道电路发生死区间(即两个绝缘节错开时),其长度不得超过()m。
A.0.5
B.1.5
C.2.5
D.3.5

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[单选题]金融机构要采取三项措施预防洗钱活动，这三项措施不包括：()
A.建立客户身份识别制度
B.客户身份资料交易记录保存制度
C.持续的员工培训制度
D.大额交易和可疑交易报告制度