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【简答题】
给出下列四个命题：①若a＞b＞0，则 1 a ＞ 1 b ；②若a＞b＞0，则 a- 1 a ＞b- 1 b ；③若a＞b＞0，则 2a+b a+2b ＞ a b ；④若a＞0，b＞0且2a+b=1，则 2 a + 1 b 的最小值为9；其中正确命题的序号是______（将你认为正确的命题序号都填上）．
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举一反三
【单选题】I really don't know _____ I put my wallet. [ ]
A.
where was it
B.
it was where that
C.
where it was that
D.
where was it that
【简答题】简述利率的决定与影响因素。
【简答题】简述利率的决定与影响因素。(手写拍照上传)
【简答题】纤维后加工中拉伸的作用是什么？
【简答题】涤纶短纤维后加工各工序的作用是什么？
【单选题】I decided to follow it to see _________.
A.
where it was going
B.
where was it going
C.
what was it going
D.
what it was going
【简答题】简述利率的决定与影响因素。
【单选题】．— you got to know where I was yesterday? —Through a student.
A.
Where was it that
B.
When was it that
C.
How was it that
D.
Was it how that
【简答题】纤维后加工的作用是什么?
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