中国第一部药物学专著为() A.《本草纲目》 B.《黄帝内经》 C.《伤寒论》 D.

题型:单项选择题

问题:

中国第一部药物学专著为()

A.《本草纲目》

B.《黄帝内经》

C.《伤寒论》

D.《神农本草经》

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题型:单项选择题

声音是靠物体的______产生的,声音能在固体、______体和______体中传播,在空气(15℃)中的传播速度是______m/s.

题型:单项选择题

关于管电压的叙述正确的是()

A.是指加于X线管两极间的最高有效值电压

B.是指加于X线管两极间的最高平均值电压

C.最高管电压与X线管的长度、形状、介质材料无关

D.管电压的单位是伏特

E.是加于X线管两端的峰值电压

题型:单项选择题

Humor is a most effective, yet frequently neglected, means of handling the difficult situations in our lives. It can be used for patching up differences, apologizing, saying “no,” criticizing, getting the other fellow to do what you want without his losing face. For some jobs, it’s the only tool that can succeed. It is a way to discuss subjects so sensitive that serious dialogue may start a quarrel. For example, many believe that comedians on television are doing more today for racial and religious tolerance than people in any other forum.

Humor is often the best way to keep a small misunderstanding from escalating into a big deal. Recently a neighbor of mine had a squabble with his wife as she drove him to the airport. Airborne, he felt miserable, and he knew she did, too. Two hours after she returned home, she received a long-distance phone call. “Person-to-person for Mrs. I. A. Pologize,” intoned the operator. “That’s spelled ‘P’ as in…” In a twinkling, the whole day changed from grim to lovely at both ends of the wire.

An English hostess with a quick wit was giving a formal dinner for eight distinguished guests whom she hoped to enlist in a major charity drive. Austerity(节俭)was a fashion in England at the time, and she had asked her children to serve the meal. She knew that anything could happen—and it did, just as her son, with the studied concentration of a tightrope walker, brought in a large roast turkey. He successfully elbowed the swinging dining-room door, but the backswing threw the bird onto the dining-room floor.

The boy stood rooted: guests stared at their plates. Moving only her head the hostess smiled at her son,” No harm, Daniel,” she said. “Just pick him up and take him back to the kitchen”… she enunciated clearly so he would think about what she was saying… “and bring in the other one.”

A wink and a one-liner instantly changed the dinner from a red-faced embarrassment to a conspiracy of fun.

小题1:What is the main idea of the passage?

A.Humor is the key to success in our work and our lives.

B.Humor enables us to cope with difficult situation effectively.

C.Humor is the only best way to criticize someone without losing his face.

D.Humor makes fun of any difficult situations.小题2:Which of the following is NOT stated in the passage?

A.Comedians on TV are believed to have done a lot in making people more tolerant of racial and religious differences.

B.To make up differences, humor is a most acceptable as well as a most effective means.

C.People often turn to humorous ways when meeting with difficult situations because of its effectiveness.

D.Only by adopting the means of humor can one succeed in some jobs.小题3:By saying “and bring in the other one,” the hostess meant that_________.

A.the son had to cook another turkey for the guests

B.she already had made more than one turkey ready for the dinner

C.some other dish would be served instead of a turkey

D.the son could serve the same turkey after it was cleaned

题型:单项选择题

阅读下面短文,回答27—31题。
金属历来都是通过采矿、冶金制取的,可是80年代初期,科学家发现在聚乙炔中加入强氧化剂或还原剂后,它的导电性能大大提高。因为这种塑料具有金属的一般特性,所以人们称它为“人造金属”。近年来,它的发展极为神速,人们又先后研制成功了聚苯乙炔、聚苯硫醚和聚双炔类等。这种人造金属不仅具有金属光泽,还能导电传热,其用途十分引人瞩目。
“人造金属”最奇特的功能是它的导电性。与普通塑料不同的是,“人造金属”塑料具有一种独特的线型结构,许多同样的分子能奇妙地结合起来,并带有较多的“自由”电子。这就使原来的塑料改变了物理性能,能够导电。它的导电率比铜、银还要高。普通金属的导电性,随着温度的降低而增大,在接近绝对零度时成为超导,但这种低温度很难得到。而人造金属却相反。随着温度升高,外围“自由”电子释放越来越多,因此导电性增大,在常温下呈现出超导电性能。实现超导,由低温变成常温,这是人造金属创造的一大奇迹,是科学家梦寐以求的目标,用超导体制造的发电机,它的效率可以从30%提高到98%,超导电线将使远距离无损耗输电的设想成为可能,使火车悬浮在轨道上高速运行,将使控热核聚变反应成为现实,最终解决能源问题。
人造金属的另一突出贡献是,用它制成的新型电池代替笨重、硕大的铅蓄电池,可以使人们长期用蓄电池做动力汽车有了(①)的可能。人造金属电池可提供相当常规电池10倍的电力,不需要维修,充电次数可达1000次以上,使用寿命比铅蓄电池长4~5倍,而且不会污染环境。
人造金属在外压和光的作用下,能产生电场效应,把它装在扩音器上,能将声音放大;把它放在红外摄像机上,在红外热能作用下,也能产生工作电流进行录像。此外,人造金属弹性大、易加工、重量轻、耐磨蚀性能好、强度高、成本低。

对第三段的大意有几种说法,正确的一项是( )。

A.说明了地球表层的情况

B.说明了地球的构造

C.说明了喜马拉雅山是如何形成的

D.说明了板块大地构造假说是如何形成的

题型:单项选择题

下列关于Java的说法正确的是( )。

A.10

B. 程序有误

C.1

D.0

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