设集合A={y|y=2x+1},全集U=R,则CUA为( ) A.(1,+∞)

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问题:

设集合A={y|y=2x+1},全集U=R,则CUA为(  )

A.(1,+∞)

B.[1,+∞)

C.(-∞,1)

D.(-∞,1]

考点:集合间交、并、补的运算(用Venn图表示)
题型:选择题

机车信号为什么两个线圈要反接?

题型:选择题

读图,回答下列问题。

(1)F点的点坐标____________。

(2)若图中阴影表示黑夜,则此时太阳直射在____________上,E点物体影子的朝向是_________方。

(3)A、C、F三点一年有两次阳光直射的是________点。

(4)由F到B的行进方向是________________________。

题型:选择题

认知学说认为各种心理障碍都源于()

A.错误的学习

B.潜意识动机冲突

C.不良的社会环境

D.不合理信念、错误的思维方法

E.以上观点均不正确

题型:选择题

A good translator is by definition bilingual. The opposite is not ______(1) true, however. A born and bred bilingual will still need two__________(2) to become a translator: first, the skills and experience necessary for__________(3); second, knowledge of the field in which he or she will__________(4). The skills and experience for translation include the ability to write ______(5) in the target language, the ability to read and understand the_________(6) language material thoroughly, and the ability to work with the latest__________(7) and communication hardware and software.Does a born and bred bilingual__________(8) a better translator than someone who learned language B later in__________(9) There is no definite answer, but the following issues are important.__________(10), a born and bred bilingual often suffers from not truly knowing __________(11) language well enough to translate, with some even suffering from what __________(12) known as a lingualism, a state in which a person lacks_________(13) full, fluent command of any language. Second, born and bred bilinguals__________(14) don’’t know the culture of the target language well enough to_________(15) top-quality translations, or cannot recognize what aspects of the source language__________(16) its culture need to be treated with particular care, as they_________(17) in a sense too close to the language. And last, they often_________(18) the analytical linguistic skills to work through a sticky text.On_________(19) other hand, the acquired bilingual may not have the same in-depth _________(20) of colloquialisms, slang, and dialect that the born bilingual has. Also, the acquired bilingual will not be able to translate as readily in both directions (from B to language A and A to language B). Finally, born bilinguals often have a greater appreciation of the subtleties and nuances of both their languages than someone who learns their B language later in life can ever hope to have.

题型:选择题

为防止气瓶充气时装错而发生爆炸,可燃气体钢瓶(如氢气、乙炔)的螺纹是()的。

A、反扣

B、正扣

C、右旋

D、焊接

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