一种碳纳米管(氢气)二次电池原理如图,该电池的电解质为6mol/L⇌KOH溶液,

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问题:

一种碳纳米管(氢气)二次电池原理如图,该电池的电解质为6mol/L⇌KOH溶液,下列说法不正确的是(  )

A.储存H2的碳纳米管作电池正极

B.放电时负极附近pH减小

C.放电时电池正极的电极反应为:NiO(OH)+H2O+e-=Ni(OH)2+OH-

D.放电时,电池反应为2H2+O2=2H2O

考点:一次电池二次电池燃料电池
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在横线里填上“>”或“<”.

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《送元二使安西》写送别情景:“(),西出阳关无故人。”

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以下提供若干个病例,每个病例下设若干道考题。请根据答案所提供的信息,在每一道考题下面的A、 B、C、D、E五个备选答案中选择一个最佳答案。

男性,45岁,平素体健,5天来感冒,述伴有高热、寒战、上腹痛和自觉气短。

根据上述这些表现,为进行鉴别诊断,查体哪个体征无帮助

A.腹部是否存在压痛、反跳痛和肌紧张

B.胸部的啰音及其部位

C.胸部双侧叩诊音及呼吸音的比较

D.胸部摩擦音的出现

E.关节是否红肿

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In the early 1970’s, Citibank of New York City became one of the first financial institutions to install ATM’s on a large scale. Since then, the (1) of automated teller machines has increased dramatically. At the time, the bank hoped (2) their operating costs by replacing human tellers with machines. Little did they (3) that the cash machines would become so successful. However, as more banks added (4) automated service through ATM’s, the machines mushroomed all over the world.
To use an ATM, all you need is a (5) issued by your bank. Your bank may also (6) through a credit card, such as MasterCard or Visa. To begin a (7) , you need to insert the card into an ATM and punch in a personal identification number on the (8) . The personal ID number may consist of (9) and can prevent anyone from using the card.
The ATM next flashes instructions on its (10) for carrying out transaction. To get cash, for example, you are instructed to (11) that indicate whether the money should be withdrawn from a checking or a savings account and the (12) . This request is then displayed on the screen. After you press a button to (13) that the information is correct, the ATM goes to (14) .
How safe, you may ask, is banking by ATM The (15) is meant to prevent anyone, no matter who you are, from using a cash card (16) . If you enter the wrong ID number for a card, a message on the screen will (17) . If you fail to produce the correct number for three times, most machines will (18) .As another precaution against (19) , the bank generally limits the amount that may be withdrawn by cash card (20) , say, to $ 200.

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合同经常规定支付保证金。支付保证金要求在规定的条件下为一定的行为。支付保证金是特别为保证主要承包商支付()。

A、保险费

B、周薪

C、支付分包商,工人和原料供应商

D、赔偿事故损失

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