An infant can recognize a lot of vowels by the time he or she is a year old.

A . The degree of pain being suffered B . The degree of vision impairment C . Whether or not the brain is functioning properly D . Whether or not the victim's blood pressure is normal

A .  incoming interface.outgoing interface.ip precedence.and differentiated services code P.oint（DSCP）. B .  Incoming interace.ip precedence.differentiated services code point（DSCP），and source or d.estination address. C .  Outgoing interface.ip precedence.differentiated services code point（DSCP）.and source or d.estination address. D .  Incoming interface .outgoing interface.ip precedence and differentiated code point s.ervices（DCPS） E .  Incoming interface .ip precedence .and source or destination address.  F .  Outgoing interface.ip precedence .and source or destination address.

A . reset the connection B . forward the packet C . check the packet against an ACL D . drop the packet

A . portable growler B . galvanometer C . visual inspection D . megohmmeter

A .  voice stream mixing for conference calling B .  voice gateway C .  call admission control D .  analog or digital phone interfaces E .  XML application services F .  large scale dial plan applicatio

A . incorrect electrode setting B . incorrect nozzle position C . clogged fuel nozzle D . broken high tension lead

A . if B . wherever C . so that D . wherea

A . better than you B . better than you can C . better you ca

A．They do not try to engage their reflection in social behavior. B．They will use their reflection to help them clean themselves. C．They attempt to rub their trunks against their reflection in greeting. D．They will explore their reflection to see what they look lik

Speaker A: May I have an inquiry (咨询), please？ Speaker B: ______ A．Never mind. You can ask whatever you want. B．I'd like to know what inquiry it is. C．I' m sorry. I know little about it. D．Yes, of course. So far as I know.

An attractive , well-written resume can lead to an invitation for a job interview. ()

Prenatal deafness means that a baby is born deaf. There are several reasons【C3】______ this can happen. If parents are deaf, they may have a deaf baby. There are genes【C4】______ deafness that hearing parents can also【C5】______ on to their child. Other prenatal【C6】______ of deafness can include: accidents; medicine or drugs that the mother takes; illnesses; and genetic syndromes. Genetic syndromes are a group of characteristics that a child【C7】______ from its parents. There are two very common types of genetic syndromes related to deafness. One is Waardenburg's Syndrome. Its characteristics are very【C8】______. The person may have pigment (色素)【C9】______: a streak (条纹) of white hair; two different color eyes; or streaks of white in a man's【C10】______. It is【C11】______ to have the physical traits of Waardenburg's Syndrome but not be deaf. Usher's Syndrome is also fairly【C12】______. Children with Usher's Syndrome are born with a hearing loss and later lose their【C13】______. The first symptoms of this genetic syndrome【C14】______ at【C15】______ A person with Usher's Syndrome will【C16】______ problems seeing well in the dark. Later, they will lose their peripheral (外围的) vision and see only within a tunnel area in front of them. This is called "tunnel vision." Persons may eventually lose more and more of their vision and become blind or【C17】______ blind. If you notice that a(n)【C18】______ person does not see you when you stand at his or her【C19】______, that person may have this syndrome. The best way to communicate with a person who has Usher's Syndrome is to stand directly in front and to sign【C20】______. 【C1】 A． adults B． friends C． relatives D． students

A．one year old B．one years old C．one year big D．one-year-old

A．because there are close substitutes for the firm’s product B．because the firm is protected by barriers to entry C．because the firm produces where MR = MC D．All of the above are reasons why a monopoly can earn an economic profit in the long run．

A．necessary B．foolish C．by chance D．clear

是 否

此题为判断题(对，错)。