人造地球卫星用到的一种高能电池——银锌蓄电池,其电池的电极反应式为Zn+2OH-

题型:选择题

问题:

人造地球卫星用到的一种高能电池——银锌蓄电池,其电池的电极反应式为Zn+2OH--2e-=ZnO+H2↑,Ag2O+H2O+2e-==2Ag+2OH-。据此判断锌是(  ) 

A.负极,并被氧化

B.正极,并被还原

C.负极,并被还原

D.正极,并被氧化

考点:一次电池原电池电极反应式的书写原电池原理燃料电池
题型:选择题

平行板间加如图所示周期变化的电压,重力不计的带电粒子静止在平行板中央,从t=0时刻开始将其释放,若某段运动过程无碰板情况。下面能定性描述粒子运动的速度图象是

[ ]

A、

B、

C、

D、

题型:选择题

以下为三河建筑公司破产案件中当事人提出的破产抵销主张。其中哪一项不能合法成立( )

A.甲工厂主张抵销23万元:“三河公司收取我厂141万元预付工程款后,未履行合同即宣告破产;在此之前,我厂有23万元给三河公司的结算款,付给的汇票因填写不当被银行退回。”

B.乙主张抵销45万元:“破产案件受理前,三河公司欠我厂设备货款120万元;三河公司曾退回我厂一台质量不合格的机器,其已付价金为49万元,双方达成协议按退货处理。”

C.丙公司主张抵销85万元:“我公司欠三河公司工程款187万元;在三河公司破产宣告后,M建材厂将其对三河公司的85万元债权转移给我公司,以抵偿其欠我公司的债务。”

D.丁公司主张抵销142万元:“我公司欠三河公司工程款255万元;在三河公司破产宣告前,我公司作为保证人向银行偿付了三河公司所欠的142万元债务。”

题型:选择题

甲预谋前往乙处杀害乙,但到达后,发现乙处有人,感到无法下手,遂返回。张三的行为属于:()

A.犯罪预备

B.犯罪中止

C.犯罪未遂

D.没有犯罪行为

题型:选择题

零件加工对机床的选择原则是什么?

题型:选择题

A good translator is by definition bilingual. The opposite is not ______(1) true, however. A born and bred bilingual will still need two__________(2) to become a translator: first, the skills and experience necessary for__________(3); second, knowledge of the field in which he or she will__________(4). The skills and experience for translation include the ability to write ______(5) in the target language, the ability to read and understand the_________(6) language material thoroughly, and the ability to work with the latest__________(7) and communication hardware and software.Does a born and bred bilingual__________(8) a better translator than someone who learned language B later in__________(9) There is no definite answer, but the following issues are important.__________(10), a born and bred bilingual often suffers from not truly knowing __________(11) language well enough to translate, with some even suffering from what __________(12) known as a lingualism, a state in which a person lacks_________(13) full, fluent command of any language. Second, born and bred bilinguals__________(14) don’’t know the culture of the target language well enough to_________(15) top-quality translations, or cannot recognize what aspects of the source language__________(16) its culture need to be treated with particular care, as they_________(17) in a sense too close to the language. And last, they often_________(18) the analytical linguistic skills to work through a sticky text.On_________(19) other hand, the acquired bilingual may not have the same in-depth _________(20) of colloquialisms, slang, and dialect that the born bilingual has. Also, the acquired bilingual will not be able to translate as readily in both directions (from B to language A and A to language B). Finally, born bilinguals often have a greater appreciation of the subtleties and nuances of both their languages than someone who learns their B language later in life can ever hope to have.

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