单项选择题

患者男，67岁。患慢性支气管炎。近几天咳嗽加剧，痰液黏稠，不易咳出，给予超声波雾化吸入治疗。

A.沙丁胺醇
B.氨茶碱
C.地塞米松
D.α-胰凝乳蛋白酶
E.青霉素

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Still happily together, Mayer Solen and Joann Oakes credit Senior-Net for 'introducing' them not only to each other but also to a world of computer-literate over-60 s. 'Senior-Net offers a forum where senior citizens can talk freely, help each other, and even console each other,'Joann says. 'Even though we are scattered across the country, we can share thoughts, opinions and concerns about issues that affect us. It's like a big family. When Mayer and I travel around the country, we make it a point to look up other Senior-Net members.'Mary Furlong, founder of the 10-years-old network, says it is a painless way to socialize, especially for those recently widowed and reluctant to go out alone, and for the disableD.Senior-Net has more then 6 000 members across the United States.Joann Oakes and Mayer Solen fell for each other just before Christmas in 1991. She had been watching from a distance as Mr. Solen flitted from one group of friends to another. Finally, the two began a conversation. They discovered they were both widoweD.They talked on and on. At midnight, they said good night, turned off their computers and went to bed, Mr. Solen in the south-western state of Nevada, and Mrs. Oakes in the north-western state of Washington. From then on they talked nearly every day via their computers until their marriagE.Computers are playing Cupid for what seems to be an unlikely target—a generation that didn't know the difference between a mouse and a modem until they reached 60. Now, older adults are plugged in to exchange gardening tips, debate religion ,or try to recall the lines of old time popular songs. The marriage between seniors and computers is, in fact, perfectly natural. They grew up in a time when people wrote weekly letters to each other and kept journals and diaries. A computer is an easier way to do the samE.With no risk of censure or rejection, grandfathers can let their hair down. Church-going people confess they are not really sure what they think about religion. People who always thought of themselves as conserved and 'respectable' may be found flirting shamelessly with correspondents who live 500 miles away. If anyone dislikes the company or the discussion, they don't have to be politE.'Just hit the control button and you're gone,' says Joann Oakes.Senior-Net ______.A.is an agency providing marriage service for the old peopleB.is a network for lonely, or disabled old people to socializeC.is an online school for old people to learn computersD.often holds meetings where old people can speak freely

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It was about 2 p.m. on Mar. 9 when three Nucor Corp. electricians got the call from their colleagues at the Hickman (Ark.) plant. It was bad news: Hickman's electrical grid had faileD.For a minimill steelmaker like Nucor, which melts scrap steel from autos, dishwashers, mobile homes, and the like in an electric arc furnace to make new steel, there's little that could be worsE.The trio immediately dropped what they were doing and headed out to the plant.No supervisor had asked them to make the trip, and no one had to. They went on their own. There wasn't any direct financial incentive for them to blow their weekends, no extra money in their next paycheck, but for the company their, contribution was hugE.What's most amazing about this story is that at Nucor it's not considered particularly remarkablE.'It could have easily been a Hickman operator going to help the Crawfordsville [InD.] mill,' says Executive Vice-President John J. Ferriola 'It happens daily.' Nucor has nurtured one of the most dynamic and engaged workforces arounD.The 11 300 nonunion employees at the Charlotte (N. C.) company don't see themselves as worker bees waiting for instructions from abovE.Nucor's flattened hierarchy and emphasis on pushing power to the front line lead its employees to adopt the mindset of owner-operators.Nucor gained renown in the late 1980s for its radical pay practices, which base the vast majority of most workers' income on their performancE.An upstart nipping at the heels of the integrated steel giants, Nucor had a close-knit culture that was the natural outgrowth of its underdog identity. Legendary leader F.Kenneth Iverson's radical insight: that employees, even hourly clock-punchers, will make an extraordinary effort if you reward them richly,treat them with respect ,and give them real power.Nucor is an upstart no more, and the untold story of how it has clung to that core philosophy even as it has grown into the largest steel company in the U, S. is in many ways as compelling as the celebrated tale of its brash youth. Iverson retired in 1999.Under CEO Daniel R. DiMicco, a 23-year veteran, Nucor has snapped up 13 plants over the past five years while managing to instill its unique culture in all of the facilities it has bought, an achievement that makes him a more than worthy successor to Iverson.For a steel maker like Nucor Corp, the electric grid of which ______.A.fails frequentlyB.seldom failsC.can not bear failureD.affect little when fails

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