试题与答案

用所给单词的适当形式填空。 1. My uncle is blind (盲的).

题型:填空题

题目:

用所给单词的适当形式填空。

1. My uncle is blind (盲的). He can't see ______ (something).

2. What do you think of this story? It's ______ (fun).

3. Look! There is a dog ______ (lie) on the ground.

4. Li Lei is good at ______ (write).

5. We are planning ______ (buy) some flowers for our teacher.

6. Don't forget ______ (close) the door when you leave the room.

7. The wind blows ______ (strong). It's going to rain.

8. Look, the ______ ( leaf) of the tree are beginning to fall down.

9. —Which season do you like ______, summer, fall or winter? —Fall.

10. Spring is a ______ (wonder) season. Many things come back to life.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, D, E解析:当其他条件不变,资本价格变化所产生的规模效应和替代效应对劳动力需求发生作用的方向是相反的。即资本价格下降时带来的规模效应导致劳动力需求上升;资本价格下降时带来的替代效应...

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题型:填空题

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(2)25℃下,某Na2SO4溶液中=5×10-4 mol·L-1,取该溶液1mL加水稀释至10mL,则稀释后溶液中c(Na+) : c(OH-)=____________。

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(4)t2 ℃下,将pH = 11的苛性钠溶液V1L与pH = 1的稀硫酸V2 L混合(设混合后溶液的体积为原两溶液体积之和),所得混合溶液的pH = 2,则V1∶V2 =_______________,此溶液中各种离子的浓度由大到小的排列顺序:______________________________

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