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【单选题】
设函数y=f(x)具有导数，且f(x)>0，f'(x)>0，△x为自变量x在点x0处的增量，△y与dy分别为f(x)在点x0处对应的增量与微分，若△x>0，则( )．A.
0
B.
0
C.
△y
D.
dy
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反馈参考答案：
举一反三
【单选题】The phenomenon that words sharing the same meaning is called______.
A.
hyponymy
B.
synonymy
C.
polysemy
D.
homonymy
【单选题】The World Web is often called WWWor the Web _______
A.
for short
B.
in short
C.
by short
D.
shortened
【单选题】An aspirated [p] in pit and an unaspirated [p] in sport can be called __________ of the phoneme /p/.
A.
analogues
B.
tagmemes
C.
morphemes
D.
allophones
【单选题】In some countries, ______ is called 'equality' does not really mean equal rights for all people.
A.
which
B.
that
C.
what
D.
one
【单选题】Fluency activities usually form. what is called the ________ stage of the lesson.
A.
preparation
B.
ending
C.
revision D production
【单选题】The way that the osmotic pump pill works is based on a process called______.
A.
synthesis
B.
pressure
C.
cellulose
D.
osmosis
【单选题】蜜蜂建筑蜂房的本领使许多建筑师感到惭愧。但是，最蹩脚的建筑师从一开始就比最灵巧的蜜蜂高明的地方，是他在用蜂蜡建筑蜂房以前，已经在自己的头脑中把它建成了。这说明()。
A.
人的意识是能动的，动物则是出于本能
B.
人的意识水平比动物的意识水平高得多
C.
动物没有意识，意识是人类特有的
D.
蜜蜂的智慧在某些方面比人类高得多
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