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弧焊电源连接网路的动力线的导电截面积要足够大，其允许的电流值应等于电源的额定焊接电流。( )
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在路由器中，有一些路由表项是由路由器相互发送路由信息自动形成的，这些路由表项被称为______路由表项。
海关实行高度集中统一的管理体制和垂直领导方式，海关机构的设置为海关总署、直属海关、隶属海关和海关办事处四级。 ( )
当一个Web站点利用lis建立在NTFS分区时，限制用户访问站点资源的4种方法是：IP地址限制、______验证、Web权限和NTFS权限。
The 1990s have been designated the Decade Against Drug Abuse by the United Nations. But, (1) less than three years to go before the end of the decade, governments and health organizations (2) that they have made (3) progress in reducing drug, alcohol and tobacco abuse. Today, consumption of all these substances is increasingly steadily worldwide. (4) every country now has problems with (5) drugs. And the world is producing and consuming more alcohol and tobacco than ever. Between 1970 and 1990 beer production (6) rose by over 80 per cent. And, (7) the number of smokers keeps on (8) ,by the second or third (9) of the next century there could be 10 million deaths each year (10) smoking related illnesses.Drugs are also a huge burden (11) the world economy. In the United States, for example, it’s estimated that alcohol and illegal drug use costs the country tens of billions of dollars each year, mainly (12) health care. When the cost of tobacco related illnesses is added, (13) total more than doubles.Drugs are also closely (14) crime. Many police forces no longer (15) between illegal and legal drugs when fighting crime. In Australia, for example, experts (16) that police in some parts of the country spend between 70 and 80 per cent of their time dealing with alcohol-related incidents.One explanation for the increase in drug (17) is simply that people have more money to spend. Tobacco and alcohol companies are now (18) much more on developing countries to take (19) of greater wealth there. And criminals involved in the illegal drug trade are following (20) ,introducing drugs into countries where they were previously hardly use. （5）（）
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