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【简答题】
Should we be afraid of sharks(鲨鱼)? Maybe not. New research into the reasons for shark attacks (攻击) suggests that sharks don’t like the way humans taste! In fact, most people who are attacked by the shark are still alive after receiving only one bite (咬). Why is this? There are many opinions to explain why sharks sometimes attack people. One opinion is that sharks are just curious (好奇的). We know that sharks are the strongest animals in their environment, so they are not afraid of anything. Naturally, that means they are curious when they meet something unusual. Because they don’t have hands or feet., the only way they can find out an object is to bite it! It is thought that sharks sometimes bite humans for this reason, and then swim away. Scientists also say that sharks would not waste energy trying to eat a human, as we have a lot of bones (骨头). It is hard for a shark to eat us because sharks don’t have hands, and they can’t pull the meat off our bones. Maybe that’s why they only bite us once. Unluckily, one bite from a large shark is serious enough to hurt people greatly! Another opinion is that sharks attack humans by mistake. Some sharks may sometimes mistake humans for a seal. An example of this is when a shark  attacks a surfer. A surfer lying on a surfboard looks like a seal when seen from below. Sharks like seals because they have thick fat. Whatever the reason for shark attacks on humans, sharks should be afraid of us. Sadly, we kill almost 40 million of them each year. 小题1:What happens to people attacked by sharks? A.Most of them because blind. B.Most of them because of deaf. C.Most of them died. D.Most of them are still alive. 小题2: How do sharks find out about an unusual object according to the passage? A.By biting. B.By smelling. C.By touching. D.By killing. 小题3:Which sentence about sharks is true? A.Sharks pull meat off bones when they eat. B.Sharks might mistake humans for seals. C.Sharks like to attack surfers because of their thick fat. D.One bite from a shark is nothing serious. 小题4:What would the author write the passage mainly for? A.To tell surfers to stay away from sharks. B.To ask people to stop killing sharks. C.To let us know the reasons for shark attacks on people. D.To show that humans are much stronger than sharks.
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【单选题】下列有关外存储器的描述中不正确的是( )
A.
硬盘即是输入设备,也是输出设备
B.
U盘、硬盘、磁带、光盘都属于外存储器
C.
外存储器中所存储的信息,断电后信息也会随之丢失
D.
外存储器不能被CPU直接访问,必须通过内存才能被CPU所使用
【单选题】下列有关外存储器的描述中不正确的是
A.
U 盘、硬盘、磁带、光盘都属于外存储器
B.
硬盘既是输入设备,也是输出设备
C.
外存储器中所存储的信息 , 断电后信息也会随之丢失
D.
外存储不能被CPU直接访问,必须通过内存才能被CPU所使用
【简答题】A. At first B. In the beginning C. At first hand D. In the first place
【单选题】关于存储器的描述,错误的是:
A.
硬盘的存储容量和存取速度一般高于RAM和U盘
B.
虚拟内存利用硬盘空间充当内存使用
C.
存储器包括内存储器和外存储器,硬盘属于外存储器
D.
Cache 是为解决CPU与RAM速度不匹配的问题
【单选题】下则有关外存储器的描述中不正确的是
A.
硬盘既是输入设备,也是输出设备
B.
U盘、硬盘、磁带、光盘都属于外存储器
C.
外存储器中所存储的信息,断电后信息也会随之丢失
D.
外存储不能被CPU直接访问,必须通过内存才能被CPU所使用
【判断题】The person who issues the invitation in the first place will eventually end up paying.()
A.
正确
B.
错误
【单选题】下列有关外存储器的描述中不正确的是
A.
硬盘既是输入设备,也是输出设备
B.
U 盘、硬盘、磁带、光盘都属于外存储器
C.
外存储器中所存储的信息,断电后信息也会随之丢失
D.
外存储不能被 CPU 直接访问,必须通过内存才能被 CPU 所使用
【单选题】U盘使用的存储器属于是_____。
A.
RAM
B.
CD-ROM
C.
闪存(Flash Memory)
D.
Cache
【简答题】A.She won the first place. B.She won the second place. C.She won the third place. D.She won no medals at all.
【简答题】A.She won the first place. B.She won the second place. C.She won the third place. D.She won no medals at all.
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