The passage summarizes harmful effects of animal experiment. However, as animal experiment is indispensable in a number of areas, it might not be stopped or replaced by other alternatives.

A . IGRP B . EIGRP C . RIP v1 D . RIP v2 E . OSPF F . VTP G . CDP

A . 172.1.0.0/22 B . 172.1.0.0/21 C . 172.1.4.0/22 D . 172.1.4.0/24 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24 E . 172.1.4.0/25 172.1.4.128/25 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24

A . 172.31.17.4/30 B . 172.31.51.16/30 C . 172.31.64.0/18 D . 172.31.80.0/22 E . 172.31.92.0/22 F . 172.31.192.0/18

A . 172.31.17.4/30 B . 172.31.51.16/30 C . 172.31.64.0/18 D . 172.31.80.0/22 E . 172.31.92.0/22 F . 172.31.192.0/18

A . 10.0.0.0/21 B . 10.0.0.0/22 C . 10.0.0.0/23 D . 10.0.0.0/24

A . 172.16.0.0/18 B . 172.16.0.0/16 C . 172.16.0.0/20 D . 172.16.0.0/21

A . 192.168.0.0/24 B . B . 192.168.8.0/20 C . 192.168.8.0/21 D . 192.168.12.0/20 E . 192.168.16.0/21 F . These networks cannot be summarized.

A．Private-sector work involves a lesser degree of immigrant competition than public-sector work. B．A growing educational level has assisted African Americans find work in the private-sector more than it has done so in the public-sector. C．Immigrant population gains have benefited workers in the public-sector more than they have workers in the private-sector. D．Private-sector work often requires less in the way of educational credentials than public-sector work. E．The private-sector tends to contain stronger ethnic networks than the public sector.

A．The Internet is posing a threat to publishers. B．A new mode of publication is emerging. C．Authors welcome the new channel for publication. D．Publication is rendered easier by online service. 此题为多项选择题。

A．A.account for B．B.describe in detail C．C.give an overall view of D．D.give some good examples of

A、She will remember this experience forever. B、It is valuable. C、It is hard and tiring. D、It is irrelevant and useless now.

是 否

A.Hong Kong has faced a serious crisis caused by millions of refugees. B.Hong Kong has successfully dealt with the emergency caused by millions of refugees. C.Hong Kong’s crisis was not only a matter of housing but included a number of other problems of population growth. D.Many parts of the world may have to face the kind of problems encountered by Hong Kong and may find it much harder to deal with them.

A．The stability of marriage and the divorce rate may reflect the economic situation of the country. B．Even when economically independent, most women have to struggle for real equality in marriage. C．In order to secure their marriage women should work outside the home and remain independent. D．The impact of the growing female workforce on marriage varies from case to case.

A．Discovering new species. B．Protecting rare species. C．Restoring extinct species. D．Reforming existing species.

A．The Twelve Muscular Regions B．The Twelve Cutaneous Regions C．Thefifteen collaterals D．Thetwelve regular meridians E．Thetwelve divergent meridians

是 否