逻辑块是一种()、()、()的学具。 A.结构复杂 B.结构简单 C.操作方便 D.

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问题:

逻辑块是一种()、()、()的学具。

A.结构复杂

B.结构简单

C.操作方便

D.操作复杂

E.趣味性强

考点:小学数学教学研究小学数学教学研究题库
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权证行权采用现金方式结算的,权证持有人行权时,按行权价格与行权日标的证券结算价格及行权费用之差价收取现金。其中,标的证券结算价格为行权日前( )个交易日标的证券每日收盘价的平均数。

A.5
B.10
C.15
D.20

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已知矩阵A满足

,则A=______.

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被马克思称之为第一个 * * 宣言的是[ ]

A.《1787年宪法》

B.《权利法案》

C.《 * * 宣言》

D.《独立宣言》

题型:多项选择题

The history of African—Americans during the past 400 years is traditionally narrated (1) an ongoing struggle against (2) and indifference on the part of the American mainstream, and a struggle (3) as an upward movement is (4) toward ever more justice and opportunity.

Technology in and of (5) is not at fault; it’s much too simple to say that gunpowder or agricultural machinery or fiber optics (6) been the enemy of an (7) group of people. A certain machine is put (8) work in a certain way—the purpose (9) which it was designed. The people who design the machines are not intent on unleashing chaos; they are usually trying to (10) a task more quickly, cleanly, or cheaply, (11) the imperative of innovation and efficiency that has ruled Western civilization (12) the Renaissance.

Mastery of technology is second only (13) money as the true measure of accomplishment in this country, and it is very likely that by (14) this under-representation in the technological realm, and by not questioning and examining the folkways that have (15) it, blacks are allowing. (16) to be kept out of the mainstream once again. This time, however, they will be (17) from the greatest cash engine of the twenty-first century. Inner-city blacks in particular are in danger, and the beautiful suburbs (18) ring the decay of Hartford, shed the past and learn to exist without contemplating or encountering the tragedy of the inner city.

And blacks must change as well. The ways that (19) their ancestors through captivity and coming to freedom have begun to loose their utility. If blacks (20) to survive as full participants in this society, they have to understand what works now.

5()

A.itself

B.themselves

C.ourselves

D.himself

题型:多项选择题

施工安全管理目标中的“三消灭”是指消灭“违章指挥”、消灭“违章作业”和消灭 ( )。

A.“惯性事故”

B.“触电事故”

C.“高处坠落事故”

D.“死亡事故”

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