insects, Wenckens thought he could improve ..."可推断，改进后的发明将糖包起来，不易招惹更多的昆虫，因而比原来的更安全。

　　3．The Bee­Patch created by Wenckens ________.

　　A．is not recommended to lifeguards

　　B．may not be helpful for some victims

　　C．will protect victims from bees for an hour

　　D．has an immediate effect on the injured skin

　　解析：选B　推理判断题。由第三段末的"He cautions that people with insect allergies should continue to use medications recommended by their doctors."可推断，对昆虫过敏的人被蜜蜂蜇伤后不应简单地使用这种方法治疗，而应采用医生推荐的方法。

　　4．The Bee­Patch is widely used ________.

　　A．by adults B．in hospitals

　　C．by students D．on football fields

　　解析：选C　细节理解题。由最后一段中的"In many schools in Denmark, the Bee­Patch is already a part of first aid kits"可知，蜜蜂膏药被学生们广泛使用。

　　B

　　The Consumer Electronics Show is held yearly in the western American city of Las Vegas, Nevada.Technology companies and experts from around the world come to the event to see, hear and talk about the latest ideas and inventions.Each year's show has special trends.

　　Ultra HDTVs (超高清电视)

　　One trend at this year's show is the Ultra HDTV.Its picture is much better than that of the regular HDTV.The electronics maker Samsung says it will make more developed Ultra HDTVs.And Sony says all of its televisions will use the Android system.

　　Internet­connected devices

　　Another trend at the show is the practice of connecting home devices to the Internet.People can now connect dishwashers, stoves and refrigerators to the Internet.However, developers still want to invent a way for all of the devices to be able to communicate with each other.

　　Wearable devices

　　One such device is a special helmet (头盔) that uses light to grow hair on a person's head.Another device helps reduce pain that people may have had for a long time.Developers also showed a ring that can be used to control other devices using hand movements.

3­D devices