- 硫和氮的氧化物
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With what topic is the passage mainly concerned
A．Breeding habits of whales.
B．Differences between whales.
C．Efforts to preserve whales.
D．The intelligence of whales.
正确答案
B
解析
本题为主题题。文章首句即向我们介绍了鲸分为两大类，接着运用了举数字、比较与对比的方法分别介绍了两类鲸的情况。文章的脉络很清楚，就是向我们介绍两类鲸，因此选B。
Which of the following is mentioned by the author as a reason why the baleen whale population has been reduced
A．Increased pollution of the seas.
B．Hunting.
C．Insufficient supply of food.
D．Disease.
正确答案
B
解析
文章第二段中“Though reduced by hunting…”一句告诉我们此种鲸变少的原因在于捕杀，因此选B。
The author would most probably agree with which of the following statements about Thomas Jefferson
A．He had a broad vision of his country's future.
B．He put the interests of Virginia ahead of those of the Union.
C．He ignored the advice of people who settled the western region.
D．He was one of the first government officials to travel in the western United States.
正确答案
A
解析
本题为细节题。首先文中提到的1784年法中重要原则“underlay the whole later development of the continental United States”，后面又提到Thomas Jefferson在《独立宣言》发表前就有此主张。因此选项A应符合作者的想法，应选A。
The author implies which of the following happened to new lands that are part of the British Empire
A．They were not considered equal to Britain itself.
B．They established a separate empire of their own.
C．They had an equal share in the government of the empire.
D．They were ruled by a group of peers.
正确答案
A
解析
本题为细节题。文章通篇强调新的成员要与老成员平等。文章倒数第四行有一句话――“He had no desire to break from the British Empire simply to establish an American one―in which the newer region should be subsidiary and tributary to the old”，可见正是因为原来存在不平等的问题，美国才要求独立。据此推断出选项A正确。
According to the passage, what was the general attitude toward the principle underlying the ordinance of 1784
A．It was considered the most important doctrine of the day.
B．It received wide support at that time.
C．It was more popular in Virginia than elsewhere.
D．It was thought to be original and creative.
正确答案
B
解析
文章第四行“was generally accepted by this time and cannot be properly credited to any single man”指出，此原则被广泛接受，但很难把它归功于任何个人。因此应选B。
税务机关对纳税人等采取保全措施或强制执行措施应经( )批准。
A．各税务所所长
B．县以上税务局局长
C．省以上税务局局长
D．国家税务总局
正确答案
B
解析
[解析] 税务机关对纳税人等采取保全措施或强制执行措施应经县以上税务局局长批准。
某药物的t1／2为3小时，每隔1个t1／2给药一次，达稳态血药浓度的时间
A．6小时
B．30小时
C．10小时
D．15小时
E．24小时
正确答案
D
解析
暂无解析
心脏破裂的典型表现为
正确答案
解析
心脏破裂，不会跳，也不能再完成心动周期。但是心肌电生理现象仍然存在。
大肠癌最好发的部位是
正确答案
解析
大肠癌的发病率从高到低依次为直肠、乙状结肠、盲肠、升结肠、降结肠及横结肠。
原发性高血压细动脉的可逆性改变是
正确答案
解析
原发性高血压分良性高血压和恶性高血压两类，良性高血压又称为缓进型高血压，约占原发性高血压的95%，病理变化分三期：①功能紊乱期：基本病理改变为全身细小动脉间歇性痉挛，这一期为可逆性病变。②动脉病变期：细动脉硬化是高血压的主要病理特征，表现为细动脉玻璃样变，为不可逆病变。③内脏病变期：心、 肾、脑等代偿性病变。B项不属于高血压细动脉的改变，故排除。
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