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【单选题】
被称之为万能的是A.
水
B.
丙二醇
C.
二甲基亚砜
D.
氮酮
E.
甘油
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举一反三
【单选题】The number of students of this school ____greatly in the last few years.
A.
is increasing
B.
has increased
C.
are increasing
D.
have increased
【单选题】What is the Kiowas' place of origin?
A.
The Southern Plains
B.
The Wichita Mountains
C.
Yellowstone
D.
The Black Hills
【简答题】阅读理解。 Trip 1 Black Bear Count There have been fires in this area in the last few years and the Office of the National Park is not sure how many black bears are still living. Some bears have been seen ...
【单选题】The international situation has been growing ______ difficult for the last few years.
A.
invariably
B.
presumably
C.
increasingly
D.
dominantly
【单选题】非抗震时 纯悬挑梁 XL 底筋锚固长度为( )。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
10d
B.
12d
C.
15d
D.
20d prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【简答题】给出如下五个结论: ①存在α∈(0, ),使sinα+cosα= ; ②存在区间(a,b),使y=cosx为减函数而sinx<0; ③y=tanx在其定义域内为增函数; ④y=cos2x+sin( -x)既有最大值和最小值,又是偶函数; ⑤y=sin|2x+ |的最小正周期为π. 其中正确结论的序号是____.
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