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【单选题】
下列离子的浓度均为1.0 mol/L,其中能在1.0 mol/L NH4Cl溶液中生成氢氧化物沉淀的是(括号内数据为该离子形成氢氧化物的积常数,KbNH3=1.75×10^-5)()
A.
Mn2+( 1.9× 10^-13 )
B.
Mn2+( 1.2× 10^-15 )
C.
Fe3+ (4.0× 10^-38 )
D.
Mg2+ (1.8×10^-11 )
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【单选题】张大爷,56岁。拟诊为右肾结石,欲行IVU检查。为保证摄片的质量和安全,摄片前宜做好准备,下列不正确的是
A.
摄片2~3天禁用不透X线的药物
B.
摄片前1日少渣饮食,服缓泻剂
C.
摄片日禁食并排便
D.
造影前碘过敏试验
E.
摄片前鼓励病人多饮水,促进造影剂排出,减少体内残留
【单选题】经腹壁胃肠超声检查准备,下列哪一项是错误的
A.
检查应安排在X线钡剂检查之后
B.
检查前1天晚餐宜进流食
C.
禁食8~12小时
D.
大肠检查不必禁食
E.
胃内潴留物较多时可考虑洗胃
【单选题】经腹壁胃肠超声检查准备,下列哪一项是错误的
A.
检查应安排在X线钡剂检查之后
B.
检查前一天晚餐宜进流食
C.
禁食8~12小时
D.
大肠检查不必禁食
E.
胃内潴留物较多时可考虑洗胃
【单选题】经腹壁胃肠超声检查的准备,下列错误的是
A.
超声检查应安排在X线钡剂检查之后
B.
超声检查前1天晚餐宜进流食
C.
禁食8~12小时
D.
大肠检查不必禁食
E.
胃内潴留物较多时可考虑洗胃
【单选题】Which statement about the U.S. Constitution is NOT true?
A.
It is the supreme law of the land.
B.
It is the oldest written constitution in the world.
C.
It was adopted in 1781 at the Second Continental Congress.
D.
It provides the basis for political stability, economic growth and social progress.
【简答题】S1:What is the cargo hold bale capacity of the vessel?S2:It is 84000 cubic meters.Q:What is the cargo hold bale capacity the vessel?A. It is 48000 cubic meters. B. It is 84000 cubic meters. C. It is 8...
【简答题】My name is Bill.I ' m a 13­year­old middle school student.I study in Sun Middle School.It ' s in a 1 1 neighborhood.It ' s far from the busy streets.There are many buildings in my school.In the front ...
【简答题】In this endeavor to wed the vision of the Old World with that of the New, it is the writer, no the statesman, who is our strongest arm.
【单选题】What does the passage tell us about the wheel.
A.
It is simple.
B.
It is complicated.
C.
It is strange.
D.
It is unusual.
【单选题】Which of the following about the controlling idea is not true?
A.
It is always the first sentence.
B.
A paragraph is a sentence or group of sentences that support one main idea. That’s what we call the “controlling idea” because it controls what happens in the rest of the paragraph.
C.
The information in each paragraph must be related to that idea.
D.
It is about the most important idea that you are trying to convey to your reader in a paragraph.
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