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【简答题】
试举一个间歇运动机构,其主动件做连续回转运动,从动件做间歇运动的是 ( ) 机构。
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皮皮学刷刷变学霸
举一反三
【简答题】One night he caught some mice in his
office and made friends with _______.A. all of them B. one of them in particular C. none of them D. some of them
【单选题】In Unit 4. One night he caught some mice in his office and made friends with ________.
A.
all of them
B.
one of them in particular
C.
none of them
D.
some of them
【简答题】One night, however, our vicar woke up with a start: the clock was the hours! Looking at his watch, he saw that it was one o'clock, but the bell struck thir times before it stopped. Armed with a to...
【单选题】如微信群内看到“未经证实”关于身边某某地又发现新的新型冠状病毒肺炎情况的文章和图片信息。应该如何应对()
A.
积极转发 扩散
B.
不信谣，不传谣，等待官方信息
C.
不转发，但积极评论
D.
只转发给少部分好友
【简答题】设函数f（x）=lg（x 2 +ax-a-1），给出下列命题： （1）f（x）有最小值； （2）当a=0时，f（x）的值域为R； （3）当a＞0时，f（x）在区间[2，+∞）上有单调性； （4）若f（x）在区间[2，+∞）上单调递增，则实数a的取值范围是a≥-4． 则其中正确的命题是______．（写上所有正确命题的序号）．
【简答题】判断下列函数的奇偶性 （1）f(x)= （2）f(x)=-3x+1 2、判断下列函数的单调性 （1）f（x）=4x-2 （2） f(x)=-x 3、判断函数f(x)= 在区间（0，+∞）内的单调性。
【单选题】One night he caught some mice in his office and made friends with ________.
A.
all of them
B.
one of them in particular
C.
none of them
D.
some of them
【单选题】One night he caught some mice in his office and made friends wirh_______.
A.
all of them
B.
one of them in particular
C.
none of them
D.
some of them
【单选题】如微信群内看到“未经证实”关于身边某某地又发现新的新冠肺炎疫情情况的文字和图片信息,应该如何应对()。
A.
积极转发扩散
B.
不信谣，不传谣，等待官方消息
C.
不转发，但积极评论
D.
只转发给少部分好友
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