在绑扎铝导线时，应在导线与绝缘子接触处缠绕（）。A．铝包带 B．黑胶布 C．绝缘布

如果在载玻片上写一个“d”字，在显微镜视野内看到的是（）

A.b    B.D.   C.p    D.q

某县的文史资料有这样三条记录：①1940年12月16日，国民党自卫队特务团渡湖返乡，与日伪军在小屯发生激战，历一昼夜，斩获甚众，毙日大佐一名，我胡团长壮烈牺牲。②1941年国民党游击队拔除二郎庙、封新庄、西山等日伪据点。③1943年国民党游击队夜袭县城，击毙伪军大队长宋好禄。从历史研究的角度看，这些史料可以纠正下列哪一认识  

A． * * 党主要在敌后抗战

B．国民党抗战主要采取阵地战

C．国民党执行片面抗战路线

D．国民党只在正面战场抗战

电镀或焊接前，常用稀盐酸除去铁制品表面的铁锈（主要成分为Fe₂O₃），用化学方程式表示其反应原理：______．

"Children should not be left unsupervised (无人监督的) to play with a dog." say experts in this week's British Medical Journal. Their advice is part of a review aimed at doctors who deal with dog bites.

"Dog bites and maulings are a worldwide problem, particularly in children." write Marina Morgan and John Palmer. Every year 250,000 people who have been bitten by dogs attend minor injuries and emergency units in the United Kingdom, and half of all children are reportedly bitten by dogs at some time, boys more than girls.

Accurate death figures are difficult to obtain, but in the past five years, two to three cases a year have made news headlines.

Based on the latest medical evidence, they advise doctors how to examine and treat a patient presenting with a dog bite. They discuss the risk of infection and when to refer to specialist care. For travelers bitten abroad, they suggest assessing the risk of rabies(狂犬病).

In terms of prevention, they suggest that children should be taught to treat dogs with respect, avoid direct eye contact, and not tease them. They should be taught not to approach an unfamiliar dog; play with any dog unless under close supervision; run or scream in the presence of a dog; pet a dog without first letting it sniff you; or disturb a dog that is eating, sleeping, or caring for its babies.

"Dog owners also need to change their behavior", says Rachel Besser, a children's doctor and lifetime dog owner, in an article.

"It is clear that not all dog owners appreciate that children should not be left unsupervised with a dog", she says. Just as some parents are obliged to take parenting classes, she would like to see compulsive classes for expectant dog owners to teach them about the responsibilities of dog ownership. Educational programs are also needed to teach children about some precautionary （预防的) behaviors around dogs.

Finally, she would like to see animal doctors advising dog owners about bite prevention, and doctors promoting bite prevention when treating patients who have been bitten by dogs.   

小题1:Dog biting is a problem which _____.

A．only happens to a few children

B．should be paid attention to

C．only boys may meet with

D．has made news headlines小题2:The underlined word "they" in Paragraph 4 refers to "________" .

A. doctors         B. parents            C. experts            D dog owners

小题3:To avoid dog bites, a child should be taught to_____.

A．have direct eye contact

B．approach an unfamiliar dog

C．run or scream in the presence of a dog

D．leave a dog feeding itself小题4:What are Rachel Besser's words mainly about?

A．It's necessary to teach children how to raise dogs.

B．Children should be taught not to play with dogs.

C．All the dog owners would like to attend classes on caring for dogs.

D．Some dog owners would like children to be left unsupervised with a dog.小题5:Which of the following can be the best title for the passage?

A．Dogs, Dangerous To Children

B．Children Should Know Behaviors Around Dogs

C．Doctors, Treat Dog Bites Correctly

D．Never Leave Children Unsupervised With Dogs

对熊猫体内所有可能与食物选择和消化相关的基因的研究分析显示，熊猫拥有一个典型的肉食动物用来合成一系列消化酶的所有基因。进一步比对熊猫基因组与其他肉食动物基因组的差异，研究人员又发现了另一个奇妙之处。众所周知，甜、咸、酸、苦、鲜是5种基本味觉。但熊猫的味觉感受器基因与狗的相比，虽然在苦味的感觉上似乎略胜一筹，但负责感受鲜味的T1R1基因，却因为发生移码突变而变成了“假基因”。此前的研究表明，T1R1基因和T1R3基因是决定一种动物能否感受到鲜味的关键基因。这一基因的缺失，使得熊猫即使不闻韶乐，也不知肉味。
根据这段文字，以下说法正确的是( )。

A．T1R1基因发生移码突变使得熊猫变为“素食主义者”
B．熊猫的味觉感受基因组与狗的基因组十分接近
C．熊猫体内具有各种用来消化肉食的消化酶
D．动物能否感觉到鲜味是以T1R1基因和TlR3基因为决定性因素的