海船船员考试
单选题One method of controlling rats on vessels is by rat-proofing. Rat-proofing is accomplished by （）.A installing rat guards on the mooring lines when in portB keeping foods protected and avoiding the accumulation of garbageC eliminating possible living sp
题目
installing rat guards on the mooring lines when in port
keeping foods protected and avoiding the accumulation of garbage
eliminating possible living spaces for rats when the ship is constructed
trapping and/or poisoning the rats
参考答案和解析
相似问题和答案
第1题：
In C language, one method of communicating data between functions is by ______.
A．arguments
B．variables
C．messages
D．constants
解析：译文的含义是：在C语言中，函数之间的一种通信方式是使用()。选项A～选项D的含义分别是：参数、变量、消息和常量。
第2题：
Vessels having main engines arranged for air starting are to be provided with at least__.
A.one automatic drain serving both containers
B.two air starting containers of approximately equal size
C.one control air container and one starting air container
D.one additional means of starting the main engine
第3题：
Which one of the following is not an acquisition method?
A advertising
B invitation
C negotiation
D purchase
E all are acquisition methods
第4题：
B．The inductive method.
C．The guided discovery method.
D．The productive method.
第5题：
The required number and type of hand portable fire extinguishers for staterooms on cargo vessels is ______.
A.one A-I
B.one B-I
C.one C-I
D.none required
第6题：
A、classical Method
B、minimum method
C、audiolingual Method
D、aural-oral method
第7题：
A head on situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and ______.
A.one sidelight and the masthead light are visible
B.the vessels will pass closer than half a mile
C.both vessels sound one prolonged blast
D.both sidelights and masthead light(s) are visible
第8题：
There are many methods in the CPETT .One of them is the method that runs a Kernel as the load of a computer.So we call it
A．Monitor method
B．Model method
C．Benchmark method
D．Physical method
第9题：
There is a ______ when one or more vessels are towing or pushing another vessel or vessels，provided that they are all involved in commercial activities and not in a salvage operation．
A.private safety
B.private maritime adventure
C.common safety
D.common maritime adventure
第10题：
第二篇
Exercise and Brain
Just as exercise strengthens the heart and lungs,bones and muscles,it may also power up the brain.A succession of scientific studies of animals implies that physical activity has a positive effect on mental functioning.
"It's clear that the brain benefits from exercise,"says brain scientist William Greenough of the University of Illinois at Urbana-Champaign.His studies with rats have demonstrated two primary effects of activity:Vigorous physical exercise provides the brain with more fuel,and skill-based ex-ercise increases the formation of connections in the brain, which, according to the proposals of some scientists,may make the brain better able to process information.
In one experiment,laboratory rats were separated into three groups.One group was exercised by running inside an automatic wheel,a second group improved their skills in a complicated obstacle course,and a third group was inactive.
"The animals that learned to go through the obstacle course exhibited a greater number of brain connections than the animals in the exercised or inactive groups,"Greenough said."In contrast, the animals that exercised inside the automatic wheel possessed a greater density of blood vessels in the brain than did either of the other two groups of animals."
Learning a new dance step may boost the brain in the same way that learning a language can, he says.And if the dance is a good physical exercise as well,the benefits multiply.Young brains may be especially able to boost brain power through exercise,suggested another of Greenough's experiments that showed the most significant changes in the brain occurred among rats that had been exercised when very young.And while animals aren't people,he says it is logical to make the inference that an effect found in rats may also apply to humans.
Human studies have focused primarily on older adults and suggest that regular exercise can improve the speed with which the brain processes information.Measurements made by Arthur Kramer at the University of Illinois demonstrated that inactive adults,aged 63 to 82,could hit buttons faster in response to a tone after they went through a 10-week water exercise course.A corresponding control group that didn't exercise showed no improvement.
A:One group was exercised by running circles inside.
B:One group was exercised in a complicated obstacle course outside.
C:The animals that learned to go through the obstacle course exhibited a greater number of brain cells than the animals in the exercised or inactive groups.
D:The animals that exercised inside the automatic wheel possessed a greater density of blood vessels in the brain than did either of the other two groups of animals.
文章第二段第二句提到：高强度体育运动给大脑提供更多的燃料，而技巧性运动则增强大脑神经的联结。依照某些科学家的见解，这种联结能使大脑更好地处理信息。因此选择A项，而B项和C项是技巧性运动的功能，D项不符合文章意思。
文章第三段和第四段告诉我们选项A应该是。nning inside an automatic wheels；选项B文中没有提到是inside还是outside；选项C应该是a great number of brain connections；选项D是正确的。
文章第五段第一句告诉我们“学习一种新的舞蹈和学习一种语言一样，都能促进大脑发展。如果这种舞蹈还是一种良好的体育运动，则益处加倍”，因此A和B项都排除。根据文章第三段和第四段，我们知道只有being inactive inside不能促进大脑发展。
根据文章我们知道选项A里老鼠的实验结果应当可以应用到对人类的研究，因此是错误的；文章第五段告诉我们选项B的表述是正确的；文章第六段告诉我们“经常锻炼能提高大脑处理信息的速度”，但并没有说该实验结果不能应用于其他年龄段的人，因此是错误的；根据文章第二段我们知道两种锻炼对大脑会产生不同的影响，因此选项D也是错误的。