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【单选题】
Dogs are social animals and without proper training, they will be have like wild animals. They will spoil your house, destroy your belongings, bark excessively, fight other dogs and even bite you. Nearly all behavior. problems are perfectly normal dog activities that occur at the wrong time or place or are directed at the wrong thing. The key to preventing or treating behavior. problems is learning to teach the dog to redirect its normal behavior. to outlets that are acceptable in the domestic setting. one of the best things you can do for your dog and yourself is to obedience train (驯服) it. Obedience training doesn't solve all behavior. problems, but it is the foundation for solving just about any problem. Training opens up a line of communication between you and your dog. Effective communication is necessary to instruct your dog about what you want it to do. Training is also an easy way to establish the social rank order. When your dog obeys a simple request of 'come here, sit,' it is showing obedience and respect for you. It is not necessary to establish yourself as top dog or leader of the dog pack (群) by using extreme measures. You can teach your dog its subordinate (从属的) role by teaching it to show submission to you. Most dogs love performing tricks for you to pleasantly accept that you are in charge. Training should be fun and rewarding for you and your dog. It can enrich your relationship and make living together more enjoyable. A well-trained dog is more confident and can more safely be allowed a grea- ter amount of freedom than an untrained animal. Behavior. problems of dogs are believed to ______ .
A.
be just part of their nature
B.
worsen in modem society
C.
occur when they go wild
D.
present a threat to the community
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【简答题】某课题小组对课本的习题进行了如下探索,请逐步思考并解答 小题1:(人教版教材习题24.4的第2题)如图1,两个大小一样的传送轮连接着一条传送带,两个传动轮中心的距离是10m,求这条传送带的长­­­_________.[ 小题2:如图2、将传动轮增加到3个,每个传动轮的直径是3m,每两个传动轮中心的距离是10m, 求这条传送带的长­­­­­­­­__________. 小题3:改变动态关系,将静态问...
【单选题】本题那项不符合消防安全标志的设置要求:_____
A.
消防安全标志应设在与消防安全有关的醒目位置。标志的正面或其邻近不得有妨碍公共视读的障碍物;
B.
除必须外,标志一般不应设置在门、窗、架等可移动的物体上,也不应设置在经常被其它物体遮挡的地方;
C.
设置的消防安全标志,应使大多数观察者的观察角接近90°;
D.
消防安全标志的民族教育由最小观察距离确定。
【单选题】[ 教材拓展题 ](1) 如图,用刻度尺测物体长度,此刻度尺的分度值 ,铅笔的长度是 . (2) 秒表读数为 s.
A.
1mm  ,3.6cm, 156s
B.
10mm  ,3.6cm, 160s
C.
1.1mm  ,3.6cm, 156s
D.
1.0mm  ,3.6cm, 156s
【单选题】化合物结构中具莨菪酸的特殊反应是( )
A.
紫脲酸铵反应
B.
重氮化-偶合
C.
Vitali反应
D.
FeCl 3 显色反应
E.
异羟肟酸铁反应
【单选题】化合物结构中具莨菪酸的特殊反应是()
A.
紫脲酸胺反应
B.
重氮化-偶合反应
C.
Vitali反应
D.
FeCl3显色反应
E.
异羟肟酸铁反应
【多选题】气瓶主要检查内容应包括()
A.
气瓶使用单位必须对气瓶的入库与发放实行登记制度。
B.
必须在检验周期内使用。
C.
气瓶应储存于气瓶专用库内,库房应符合有关规定,库房门口应有醒目的安全标志。
D.
库房应远离热源,严禁明火,有防止阳光直射库内的措施;库内应通风良好,保持干燥,不允许有通往室外的沟道等。
E.
盛装毒性气体或相互接触后能引起燃烧、爆炸以及产生毒物的气瓶,应分库存放,并在附近设置防毒护具或消防器材。
【判断题】消防安全标志应设在与消防安全有关的醒目的位置。标志的正面或其邻近不得有妨碍公共视读的障碍物。
A.
正确
B.
错误
【判断题】所谓思想性, 是指概念、 原理、 定义和论证等内容的叙述是否清楚、准确, 是否正确反映事物的本质与规律。所谓科学性, 是指活动、 作品等的政治倾向或价值取向性。
A.
正确
B.
错误
【单选题】化合物结构中具莨菪酸的特殊反应是( )
A.
紫脲酸铵反应
B.
重氮化一偶合反应
C.
Vitali反应
D.
FeCl3显色反应
【单选题】化合物结构中具有莨菪碱的特殊反应是
A.
紫脲酸铵反应
B.
重氮化-偶合反应
C.
Vitali反应
D.
FeCl3反应
E.
异羟肟酸铁反应
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