输卵管积水的特征性声像图是A．宫旁曲颈瓶状或藕节状液暗区 B．子宫增大 C．道格拉斯

转化炉的引风机必须先开挡板，然后按动电钮启动。

根据2002年全国性营养调查，我国成年居民钙的平均摄入量（每标准人日）约为推荐的适宜摄入量的70%

美国独立战争开始的标志是[ ]

A．来克星顿的枪声

B．发表《独立宣言》

C．萨拉托加大捷

D．英国承认美国独立

It was a fixing sight: there, in the Capitol itself, a U.S. Senator often mocked for his halting, inarticulate speaking, reached deep into his Midwestern roots and spoke eloquently, even poetically, about who he was and what he believed, stunning politicians and journalists alike.

I refer, of course, to Senator Jefferson Smith. In Frank Capra’s classic Mr. Smith Goes to Washington, Jimmy Stewart plays this simple, idealistic small-town American, mocked and scorned by the big-moneyed, oh-so-sophisticated power elite--only to triumph over a corrupt Establishment with his rock-solid goodness.

At root, it is this role that soon-to-be-ex-Senator Bob Dole most aspires to play: the self effacing, quietly powerful small-town man from Main Street who outwits the cosmopolitan, slick-talking snob from the fleshpots. And why not There is, after all, no more enduring American icon.

How enduring Before Americans had a Constitution, Thomas Jefferson was arguing that the new nation’s future would depend on a base of agrarian yeomen free from the vices inherent in big cities. In 1840 one of the classic, image-driven presidential campaigns featured William Henry Harrison as the embodiment of rural virtues, the candidate of the log cabin and hard cider, defeating the incumbent Martin Van Buren, who was accused of dandified dress and manners.

There is, of course, a huge disconnect between this professed love of the simple, unspoiled life and the way Americans actually live. As a people, Americans have spent the better part of the 20th century deserting the farms and the small towns for the cities and the suburbs; and are torn between vacationing in Disney World and Las Vegas.

U.S. politicians too haven’t exactly shunned the temptations of the cosmopolitan life. The town of Russell, Kansas, often seems to be Dole’s running mate, but the candidate spends his leisure time in a luxury condominium in Bal Harbor, Florida. Bill Clinton still believes in a place called Hope, but the spiffy, celebrity-dense resorts of Martha’s Vineyard and Jackson Hole are where he kicks back. Ronald Reagan embodied the faith-and-family pieties of the front porch and Main Street, but he fled Iowa for a career and a life in Hollywood.

Still, the hunger for the way Americans believe they are supposed to live is p, and the distrust of the intellectual hustler with his airs and his high-flown language runs deep. It makes sense for the Dole campaign to make this a contest between Dole as the laconic, quiet man whose words can be trusted and Bill Clinton as the traveling salesman with a line of smooth patter but a suitcase full of damaged goods. It makes sense for Dole to make his campaign song Thank God I’m a Country Boy--even if he is humming it 9,200 m up in a corporate jet on his way to a Florida condo.

According to the 3th paragraph, "Main Street" is to "fleshpots" as（）

A. "reliability" is to "illusion"

B. "classics" is to "pops"

C. "modesty" is to "luxury"

D. "ideals" is to "realities"

绝缘导线的安全载流量是指（）。

A.不超过导线容许工作温度的瞬时允许载流量；

B.不超过导线容许工作温度的连续允许载流量；

C.不超过导线熔断电流的瞬时允许载流量；

D.不超过导线熔断电流的连续允许载流量。