患者冯某,女,28岁。近患乳腺增生,两胁时痛,月经前后不定,头痛目眩,口燥咽千,乏力

题型:单项选择题

问题:

患者冯某,女,28岁。近患乳腺增生,两胁时痛,月经前后不定,头痛目眩,口燥咽千,乏力食少,脉弦而虚。治宜选用( )

A.四逆散

B.逍遥散

C.温经汤

D.金铃子散

E.桂枝茯苓丸

考点:中西医结合执业医师方剂学方剂学(二)
题型:单项选择题

如图甲所示,这是北海某公司生产的珍珠明目液,内有药液10ml,放在天平上称量其总质量,天平平衡时,右盘砝码数和游码的位置如图乙所示,则该瓶珍珠明目液的总质量为                   g,若空瓶质量为

5.8g,则珍珠明目液的密度为                   kg/m3

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江东六十四屯惨案

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造成黄土高原水土流失严重的人为因素是(  )

A.黄土质地疏松

B.黄土层受水浸湿后,强度降低,极易谈坍塌

C.夏季降水集中且多暴雨

D.乱砍滥伐和过度放牧

题型:单项选择题

体温恒定的维持在39~40℃或以上,达数天或数周,24h内体温波动范围不超过1℃的是

A.波状热

B.稽留热

C.不规则热

D.弛张热

E.间歇热

题型:单项选择题

Until recently, mobile radio was to wireless communications what the Yugo was to transportation. With a mixed clientele ranging from truckers using CBs to police armed with walkie-talkies to taxi drivers dispatched by radio, it was viewed as an unglamorous business and a technological backwater.

But specialized mobile radio, as it is known, has been rediscovered. It is now considered one of the biggest prizes in the all-out war for the public airwaves. The reason: high-tech companies have figured out how to profitably rebuild the antiquated dispatching system into an advanced cellular-telephone network that can take on the likes of AT & T and the giant Baby Bells. Upstart Nextel Communications sent shock waves through the industry last week when it agreed to buy Motorola’s SMR frequencies for $1.8 billion.

That could pose a serious threat to cellular hegemony. Although both systems are based on the same basic technology, SMR systems are digital and cover almost 25 times as much area as the average cellular network. SMR handsets won’t work on cellular systems and tend to be bulkier than cellular phones, though they provide more features, like a digital pager service. And while cellular growth has tripled to some 13 million subscribers since 2000, the technology has been losing ground. It is running out of channel capacity so fast, in fact, that 40% of cellular calls in high-density areas like Manhattan and Los Angeles fail to be completed. SMRs have capacity to spare, and service could eventually be priced 10% to 15% less than cellular. Dispatchers predict they will have at least 10 million subscribers by the end of the decade. There are now about 1.5 million users of SMRs.

The addition of another contender to an already crowded field of telephone systems will surely multiply the confusion. By the year 2010, consumers will be able to choose from at least half a dozen vendors of a dizzying array of wireless-communications services, including pagers, voice mail answering machines and cellular phones. Phone and cable television operators, such as Bell South, MCI and Cox Enterprises, are developing so-called personal communications networks, or PCNs, a highly advanced portable-phone system that is expected to cover a wider area, connect to a greater variety of services and be cheaper to operate than conventional cellular.

And many companies that have gambled on the wrong technological standards, and invested billions trying to develop the same markets, will undoubtedly lose a great deal of money before the shakeout is over. "The winners," says Nextel chairman Morgan O’Brien, "will be those who can make the choice for consumers easy." With all the anticipated confusion--mindful of the early years of personal computers--it is likely to be years before anyone calls the purchase of wireless products an "easy" choice.

How did mobile radio systems find its business competitiveness()

A. Its technological features have radically changed

B. It has been rebuilt to cater to various subscribers

C. Its dimensions have been reduced by wide margins

D. It was connected to a greater variety of services

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