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【单选题】
设f(x)在点 x. 处可微, ,则当 时,则下列结论正确的是A.
dy与 是等价无穷小量
B.
dy是比 的无穷小量
C.
是比 的无穷小量
D.
与 是同阶无穷小量
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举一反三
【单选题】As I felt so much better, my doctor ______ me to take a holiday by the sea.
A.
suggested
B.
advised
C.
considered
D.
insisted
【单选题】I felt much ________ after I told the problems to my close friend .
A.
good
B.
well
C.
better
D.
best
【简答题】Direction: Complete the sentence with a proper word on P. 42 of your textbook. Change the word form if necessary. The information in the brackets can help you to decide what kind of word you should ch...
【单选题】下列各项胸部异常体征中不出现于胸腔积液病人的是
A.
视诊患者呼吸运动减弱,
B.
触诊气管移向健侧,
C.
积液区叩诊浊音
D.
积液区听诊呼吸音增强
E.
积液区叩诊实音
【单选题】Some recent studies show that sports can not only help girls improve their health but also help them do better at school and in their daily life. Nacy Smith, 14, joined the football team when she was ...
A.
was 16 years old
B.
was in Grade 8
C.
met a lot of good friends
D.
felt bored
【简答题】Is supported senior coaching rubbed bare 1.With his head ,he ran out of the room into the freezing wind. 2.Isn’t it marvelous that such a huge roof by one single pillar? 3.She has got talent, but if s...
【单选题】I felt much ________ after I told the problems to my close friend .
A.
good
B.
well
C.
better
D.
best
【多选题】下列有关桥墩类型的分类说法正确的有( )
A.
按照构造划分为实体桥墩、空心桥墩、柱（桩柱） 式桥墩、框架桥墩
B.
按照截面形式划分为矩形桥墩、圆形桥墩、圆端形桥墩、尖端形桥墩
C.
按照材料组成可分为就地浇筑桥墩、预制安装桥墩
D.
按照施工工艺划分为 就地浇筑桥墩、预制安装桥墩
E.
按照受力划分为刚性桥墩、柔性桥墩
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