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【图片】在【图片】的某一去心邻域内有界是【图片】存在的（）条件，【图片】存在时【图片】在【图片】的某一去心邻域内有界的（）条件。（必要，充分，充分必要，用逗号隔开）
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【简答题】What happened within thirty years of the publication of The War in the Air ?
【单选题】What happened to the cats if the number of mice in a post office didn't decline within 6 months?
A.
They were killed.
B.
They were punished by not to be given food.
C.
They had to change job.
D.
They were dismissed.
【简答题】Answer the following questions based on the passage of chapter 3 religion 1. What religions are practiced in America? By what percentage of people? Of what race or national origin? 2. What has the mos...
【单选题】在恒温抽空的玻璃罩中封入两杯液面相同的糖水和纯水。经历若干时间后，两杯液面的高度将是（）
A.
糖水液面低于纯水液面
B.
糖水液面等于纯水液面
C.
糖水液面高于纯水液面
D.
视温度而定
【单选题】在恒温抽空的玻璃罩中封入两杯液面相同的糖水和纯水。经历若干时间后，两杯液面的高度将是（ ）
A.
糖水液面高于纯水液面
B.
糖水液面等于纯水液面
C.
糖水液面低于纯水液面
D.
视温度而定
【单选题】You should write the first letter of the sentence _____ capital one.
A.
on
B.
with
C.
in
D.
At
【单选题】When you are looking for a book you should write the following on slips EXCEPT
A.
the pages of the book.
B.
the call number of the book.
C.
the title of the book.
D.
the author of the book.
【单选题】在恒温抽空的玻璃罩中封入两杯液面相同的糖水 A 和纯水 B 。经历若干小时后,两杯液面的高度是
A.
A 杯高于 B 杯
B.
A 杯等于 B 杯
C.
A 杯低于 B 杯
D.
视温度而定
【单选题】在恒温抽空的玻璃罩中封入两杯液面相同的糖水 A 和纯水 B 。经历若干时间后,两杯液面的高度将是:
A.
A 杯高于 B 杯
B.
A 杯等于 B 杯
C.
A 杯低于 B 杯
D.
视温度而定
相关题目：
【单选题】在恒温抽空的玻璃罩中封入两杯液面相同的糖水和纯水。经历若干时间后，两杯液面的高度将是（）
A.
糖水液面低于纯水液面
B.
糖水液面等于纯水液面
C.
糖水液面高于纯水液面
D.
视温度而定