若在热交换器里的一根钢管,管内径是25mm,管壁厚3.25mm,管长5.00m,管内

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问题:

若在热交换器里的一根钢管,管内径是25mm,管壁厚3.25mm,管长5.00m,管内壁温度是373K,管外壁温度是371K,已知钢的热导系数λ=49W/m·K,分别按圆筒壁稳定热传导公式和平面壁稳定热传导公式计算这根钢管传递热量。

考点:普通考研08工学郑州大学2010年攻读硕士学位研究生入学试题化工原理试题B卷
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槐樟柏桃桂柳伯兆铆槐硅障

A.2

B.0

C.3

D.1

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Beyond question, Clinton was supposed to close up, stay out of sight, and avoid second- guessing his wife’s boss. After his ego blustered into oncoming traffic during Hillary’s heated primary race (1) Obama, the nation suffered from yet another turn of Clinton fatigue.

(2) this week Bill Clinton showed an instinct for robust, inclusive leadership that the (3) White House occupant could make good use of right for the time being. With President Obama struggling to (4) the political damage from the Gulf oil spill, Clinton not only can’t help himself—he’s worth being listened.

The conventional-wisdom (5) on President Obama’s early reaction to the spill was (6) he didn’t emote enough. He didn’t feel the (7) of all those people in the crisis whose livelihood would be destroyed, whose clean waters and wildlife would be (8) in black gunk.

Clinton considers this is an unfair (9) but offers a different—and more pointed— lesson to his young successor. "I think we ought to (10) in the same boat for a while... Let’s just (11) the problem, and then we can hold everybody responsible and emote or not emote, " Clinton conversed (12) CNN Anchor Wolf Blitzer.

Obama’s first (13) after the oil spill was to "feel the blame" rather than "feel the pain, " which are pretty sarcastic words as it were. No one intends to let British Petroleum (BP) management (14) the hook—for dangerously cutting corners, and for a (15) safety record. However, the President’s (16) focus on scolding BP consumed (17) White House energy while the oil gushed.

Great leaders don’t rush to criticise; Instead they instinctively (18) solutions. Rudy Giuliani, who didn’t stop to blame (19) intelligence for letting it happen, stood out from New York mayor with a girlfriend problem to 9/11 hero when he took control of a crisis and instilled confidence that a ravaged city could (20) beyond a terrorist attack.

12()

A.in

B.to

C.about

D.with

题型:问答题

关于消毒剂的选择使用,正确的是()。

A.来苏儿适用于肝炎病人的终末消毒

B.来苏儿适用于肝炎病房的洗手消毒

B.过氧乙酸适用于精密仪器医疗器械的消毒

D.戊二醛适用于外科洗手消毒但不适用于外科器械消毒

E.新洁尔灭适用于外科洗手消毒但不适用于外科器械消毒

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悬浮物的主要成份是溶解氧。()

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绦虫病的主要治疗药物是左旋咪唑。

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