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【单选题】
蓄电池一个产生( ) 电动势。A.
1V
B.
1.5 V
C.
2.1V
D.
12V
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举一反三
【单选题】On no account ______ to anyone who works in the company.
A.
my name must be mentioned
B.
my name must mention
C.
must my name be mentioned
D.
must my name mention
【简答题】解放军特种兵进行夜间射击训练时，在密闭囊形靶体内充入一定体积分数的氧气和氢气，当高温高速的子弹击中靶体时，靶体内物质发生反应，此时会听到爆炸声，原因是氢气与氧气发生反应生成水，同时放出热量．已知氧气在常温常压下是一种j色无味的气体，密度比空气略大，不易溶于水．在实验室中可采用加热氯酸钾与二氧化锰混合物的方法制得氧气，同时生成氯化钾： 阅读上述文字后，请回答下列问题： （1）文中涉及了氧气的哪些物理...
【简答题】Is advertising important or not? What factors must one take into account when developing advertising strategy?
【简答题】Shape，size and weight of freight consignments must be taken account in the price structure when a pricing policy is being decided on．（ ）
【单选题】The seller in an open account must know that in some circumstances he can present open account receivable to a law institution for acceptance.
A.
Right
B.
Wrong
C.
Doesn't say
【单选题】On account of the development of the economy, the environment is seriously polluted and we must ________ the emission of the carbon dioxide. [ ]
A.
cut in
B.
cut off
C.
cut up
D.
cut down
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