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【判断题】
在蒸馏中,回流的作用是维持蒸馏塔的正常操作,提高蒸馏效果。
A.
正确
B.
错误
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【单选题】静脉炎的护理中可使用乙醇热湿敷,其浓度宜用
A.
25%
B.
50%
C.
35%
D.
95%
E.
70%
【单选题】患者输液后出现静脉炎,应用多大浓度的乙醇进行热湿敷
A.
25%
B.
95%
C.
70%
D.
35%
【简答题】如图是一个平行四边形,图中甲部分面积是15平方厘米,乙部分的面积占整个平行四边形面积的30%.则平行四边形的面积为______平方厘米.
【单选题】听力原文: U.N. Security Council envoys pushing for an end to the Democratic Republic of Congo's almost three-year-old war are praising Congolese President Joseph Kabila for taking steps to resolve the con...
A.
U.N. Secretary Council Envoys.
B.
President Joseph Kabila.
C.
Jean-David Levitte.
D.
President Jose Eduardo Dos Santo.
【简答题】一个平行四边形和一个三角形等底等高.已知平行四边形的面积是25平方厘米,三角形的面积是多少?
【单选题】下列物质受热产生Cl2的是( )。
A.
Cl3O5
B.
ClO2
C.
Cl2O2
D.
Cl2O
【简答题】在氯水中发生下述反应:Cl 2 +H 2 O====H + +Cl - +HClO。已知 (Cl 2 /Cl - )=1.36V, (HClO/Cl 2 )=1.63V,求当Cl 2 的分压为 时,氯水的pH。
【单选题】听力原文: U.N. Secretary-General Kofi Annan abandoned efforts Wednesday to send a fact-finding mission to the Jenin refugee camp after Israel first gave a green light and then said the mission was biased....
A.
to appoint another team of fact-finders.
B.
to run over the group's composition.
C.
to find the facts about the Jenin refugees.
D.
to give a green light to the mission.
【单选题】听力原文: The U.N. International Atomic Energy Agency referred ( 提交;把......提交 使求助于 归诸于) the North Korean nuclear issue to the U. N. Security Council Thursday. The council could consider economic sanctions...
A.
could refer the nuclear issue to the U.N. Security Council
B.
would consider economic sanctions against North Korea
C.
could declare war on North Korea for the nuclear issue
D.
had reported the nuclear issue to the U.N. Security Council
【简答题】在大洋洲岛国斐济 , 有一个小岛 , 日界线刚好从岛上穿过。当地的居民都是基督教徒 , 按照当地基督教的规定 , 礼拜天必须停止一切商业活动。因此 , 所有的商店在礼拜天都只得关门大吉。可有一个聪明的商人 , 在岛上开了一个商店 , 每天都照常营业 , 而又没有违反基督教的规定。因此这个商人在礼拜天独享其利。请问 , 这个商店有什么巧妙之处 ?( )( 时间限制 2 分钟 )
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