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【单选题】
一种新型绿色电池——燃料电池,是把氢气、一氧化碳、甲烷三种气体和空气不断输入,直接氧化,使化学能转变成电能,被称为21世纪的“绿色”发电站。这三种气体可以作为燃料的原因是
A.
都是无毒无害的气体
B.
都可以燃烧并放出大量的热
C.
燃烧产物均为二氧化碳和水
D.
均在自然界大量存在
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参考答案:
举一反三
【单选题】企业原来生产高档产品,后来决定增加生产低档产品的做法是( )策略。
A.
产品线延伸
B.
产品线增加
C.
产品线缩减
D.
产品线填充
查看完整题目与答案
【单选题】Which one is not so good to be used at the beginning of breaking bad news?
A.
Unfortunately....
B.
Bad news to you.
C.
I'm sorry to say ....
D.
I know it is hard but I have to tell you that ...
查看完整题目与答案
【单选题】Which one is NOT correct?
A.
Discipline means a series of punishment meted out to badly-behaved students
B.
Discipline is a code of conduct which binds a teacher and students together so that learning can be more effective
C.
Discipline is as necessary for the teacher as it is for the students
D.
More observations have been made on acts in an indisciplined classroom than on acts in a disciplined classroom.
查看完整题目与答案
【判断题】双曲面齿轮的主要特征是主、从动锥齿轮轴线不相交,主动锥齿轮轴线低于(也有的高于)从动锥齿轮一个距离。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】企业原来生产高档产品,后来决定增加低档产品,称为()
A.
向前延伸
B.
向下延伸
C.
向上延伸
D.
双向延伸
查看完整题目与答案
【单选题】企业原来生产高档产品,后来决定增加低档产品,叫做( )。
A.
向前延伸
B.
向下延伸
C.
向上延伸
D.
双向延伸
查看完整题目与答案
【单选题】Which one is not so good to be used in the beginning of breaking bad news?
A.
Unfortunately....
B.
Bad news to you.
C.
I'm sorry to say ....
D.
I know it is hard but I have to tell you that ...
查看完整题目与答案
【单选题】( )传动的特点是主、从动齿轮的轴线相互垂直而不相交。
A.
螺旋锥齿轮
B.
双曲面齿轮
C.
圆柱齿轮
D.
蜗轮蜗杆
查看完整题目与答案
【单选题】企业原来生产高档产品,后来决定增加低档产品,这种产品组合决策叫:
A.
向下延伸
B.
向上延伸
C.
双向延伸
D.
缩减产品组合
查看完整题目与答案
【单选题】企业原来生产高档产品,后来决定增加低档产品,叫做( )。
A.
产品延伸
B.
向下延伸
C.
向上延伸
D.
双向延伸
查看完整题目与答案
相关题目:
【单选题】企业原来生产高档产品,后来决定增加生产低档产品的做法是( )策略。
A.
产品线延伸
B.
产品线增加
C.
产品线缩减
D.
产品线填充
查看完整题目与答案
【单选题】Which one is not so good to be used at the beginning of breaking bad news?
A.
Unfortunately....
B.
Bad news to you.
C.
I'm sorry to say ....
D.
I know it is hard but I have to tell you that ...
查看完整题目与答案
【单选题】Which one is NOT correct?
A.
Discipline means a series of punishment meted out to badly-behaved students
B.
Discipline is a code of conduct which binds a teacher and students together so that learning can be more effective
C.
Discipline is as necessary for the teacher as it is for the students
D.
More observations have been made on acts in an indisciplined classroom than on acts in a disciplined classroom.
查看完整题目与答案
【判断题】双曲面齿轮的主要特征是主、从动锥齿轮轴线不相交,主动锥齿轮轴线低于(也有的高于)从动锥齿轮一个距离。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】企业原来生产高档产品,后来决定增加低档产品,称为()
A.
向前延伸
B.
向下延伸
C.
向上延伸
D.
双向延伸
查看完整题目与答案
【单选题】企业原来生产高档产品,后来决定增加低档产品,叫做( )。
A.
向前延伸
B.
向下延伸
C.
向上延伸
D.
双向延伸
查看完整题目与答案
【单选题】Which one is not so good to be used in the beginning of breaking bad news?
A.
Unfortunately....
B.
Bad news to you.
C.
I'm sorry to say ....
D.
I know it is hard but I have to tell you that ...
查看完整题目与答案
【单选题】( )传动的特点是主、从动齿轮的轴线相互垂直而不相交。
A.
螺旋锥齿轮
B.
双曲面齿轮
C.
圆柱齿轮
D.
蜗轮蜗杆
查看完整题目与答案
【单选题】企业原来生产高档产品,后来决定增加低档产品,这种产品组合决策叫:
A.
向下延伸
B.
向上延伸
C.
双向延伸
D.
缩减产品组合
查看完整题目与答案
【单选题】企业原来生产高档产品,后来决定增加低档产品,叫做( )。
A.
产品延伸
B.
向下延伸
C.
向上延伸
D.
双向延伸
查看完整题目与答案
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