已知-6a9b4和15a4mbn是同类项,则代数式12m-10n的值为( ) A.

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问题:

已知-6a9b4和15a4mbn是同类项,则代数式12m-10n的值为(  )
A.67B.-13C.13D.
51
2
考点:同类项二元一次方程组的解法
题型:选择题

Mr Smith had two sons.One was seven years old, and the other was five.One morning during the holiday, when Mr Smith was cleaning the car, his younger son came and asked him for some money for sweets.

‘Sweets are bad for your teeth,’ Mr Smith said.‘Take these two oranges instead, and give one to your brother.’

One orange was much bigger than the other, and as the small boy likes oranges very much, he kept the bigger one for himself, and gave his brother the smaller one.When the other boy saw that, he said, ’It’s selfish to take the bigger for yourself.If Father had given me the oranges, I’d have given you the bigger one.’

‘I know you would,’ answered his brother.‘That’s why I took it.’

小题1:What was Mr Smith doing one morning?

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小题2:What did the younger boy ask for?

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小题3:What did his father give him instead?

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小题4:Who got the bigger orange?

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小题5:Why did the elder boy say that his brother was selfish?

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题型:选择题

咽下缩肌()。

A.副神经

B.颈襻

C.喉上神经

D.喉返神经

E.颈丛

题型:选择题

微血栓的主要成分是(  )

A.红细胞

B.血小板

C.血小板梁

D.白细胞

E.纤维素

题型:选择题

不考虑资产负债表日后事项情况下,如企业确认收入后,又发生销售退回,不论是当年销售的,还是以前年度销售的,一般应冲减退回当月的销售收入;同时冲减退回当月的销售成本,如该项销售已经发生现金折扣或销售折让的,应在退回当月一并调整。( )

题型:选择题

六位数865abc,能被3、4、5整除,要使865abc尽可能小,a、b、c分别是( )。

A.0、6、0
B.0、4、0
C.0、2、0
D.1、0、0

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