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药物的鉴别反应 肾上腺素
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下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。Car Thieves Could Be Stopped Remotely(遥远地) Speeding off(超速行驶) in a stolen car, the thief thinks he has got a great catch. But he is in a nasty surprise. The car is fitted with a remote immobilizer(使车辆不能调动的装置), and a radio signal from a control center miles away will ensure that once the thief switches the engine (51) , he will not be able to start it again. For now, such devices (52) only available for fleets of trucks and specialist vehicles used on construction sites. But remote immobilization(使车辆不能调动) technology could soon start to trickle(慢慢地移动) down to ordinary cars, and (53) be available to ordinary cars in the UK (54) two months. The idea goes like this. A control box fitted to the car incorporates (55) iniature cellphone (移动电话，手机), a microprocessor and memory, and a GPS satellite positioning receiver. (56) the car is stolen, a coded cellphone signal will tell the unit to block the vehicles engine management system and prevent the engine (57) restarted. There are even plans for immobilizers (58) shut down vehicles on the move, though there are fears over the safety implications of such a system. In the UK, an array of technical fixes is already making (59) harder for car thieves. The pattern of vehicles crime has changed, says Martyn Randall of Thatcham, a security research organization based in Berkshire that is funded in part (60) the motor insurance industry. He says it would only take him a few minutes to (61) a novice(新手，初学者) how to steal a car using a bare minimum of tools. But only if the car is more than 10 years old. Modern cars are a far tougher (艰苦的) proposition (任务), as their engine management computer will not (62) them to start unless they receive a unique ID code beamed out by the ignition(点火) key. In the UK, technologies like this (63) achieve a 31 per cent drop in vehicle-related crime since 1997. But determined criminals are still managing to find other ways to steal cars. Often by getting hold of the owners keys in a burglary (夜窃行为；盗窃). In 2000, 12 per cent of vehicles stolen in the UK were taken using the owners keys double the previous years figure. Remote-controlled immobilization system would (64) a major new obstacle in the criminals way by making such thefts pointless. A group that includes Thatcham, the police, insurance companies and security technology firms have developed standards for a system that could go on the market sooner than the (65) expects.
菌落计数时，平板菌落数的选择。应选取菌落数在30～300之间的平板作为菌落总数测定标准，两个平板任取其一即可。
药物的鉴别方法 葡萄糖
According to , the Spanish fast food business
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