问题 选择题

下列说法不正确的是(  )

A.温度越高的物体内能一定越大

B.温度越高,物体的分子运动得越快

C.温度越高,液体蒸发得越快

D.温度越高,物质扩散得越快

答案

A、物体内能跟物体的温度、质量、状态有关,只有温度高低不能判断物体内能大小.说法错误,符合题意.

B、分子运动速度跟温度有关,温度越高,分子运动越快.说法正确,不符合题意.

C、蒸发快慢跟液体的温度、液体的表面积、液体表面上空气流动速度有关.液体温度越高,表面积越大,液体表面上空气流速越大,液体蒸发越快.说法正确,不符合题意.

D、扩散现象跟温度有关,温度越高,扩散越快.说法正确,不符合题意.

故选A.

单项选择题

Millions of Americans and foreigners see GI.Joe as a mindless war toy, the symbol of American military adventurism, but that’ s not how it used to be. To the men and women who (1) in World War I1 and the people they liberated, the GI. was the (2) man grown into hero, the pool farm kid torn away from his home, the guy who (3) all the burdens of battle, who slept in cold foxholes, who went without the (4) of 1hod and shelter, who stuck it out and drove back the Nazi reign of murder. This was not a vohmteer soldier, not someone well paid, (5) an average guy, up (6) the best trained, best equipped, fiercest, most brutal enemies seen in centuries.

His name is not much. GI. is just a military abbreviation (7) Govermnent Issue, and it was on all of the article (8) to soldiers. And Joe A common name for a guy who never (9) it to the top. Joe Blow, Joe Magrae... a working class name.The United States has (10) had a president or vieepresident or secretary of state Joe.

GI. Joe had a (11) career fighting Geman, Japanese, and Korean troops. He appears as a character, or a (12) of American personalities, in the 1945 movie The Story of GL Joe, based on the last days of war correspondent Ernie Pyle. Some of the soldiers Pyle (13) portrayde themselves in the fihn. Pyle was famous for covering the (14) side of the warl, writing about the dirt-snow-and-mud soldiers, not how many miles were (15) or what towns were captured or liberated. His reports (16) the "willie" cartoons of famed Stars and Stripes artist Bill Maulden. Both men (17) the dirt and exhaustion of war, the (18) of civilization that the soldiers shared with each other and the civilians: coffee, tobacco, whiskey, shelter, sleep. (19) Egypt, France, and a dozen more countries, G. I. Joe was any American soldier, (20) the most important person in their lives.

(7)()

A.meaning

B.implying

C.symbolizing

D.claiming

名词解释