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【单选题】
下列各组离子在指定的溶液中能大量共存的是
A.
在pH=1的溶液中:Fe 2+ 、NO 3 - 、SO 4 2 - 、Na +
B.
能溶解Al(OH) 3 的溶液中:NH 4 + 、SO 4 2 - 、Cl - 、HCO 3 -
C.
酚酞呈红色的溶液中:K + 、Na + 、AlO 2 - 、NO 3 -
D.
含有大量Fe 2+ 的溶液中:H + 、K + 、ClO - 、SO 4 2 -
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【单选题】如果电泳分离蛋白质样品的分离效果不佳,分辨率不好,下列哪种调整方式不会取得明显的改善?
A.
调节电泳时的电压或电流
B.
调节电泳时间
C.
调整凝胶的浓度或交联度
D.
增大样品的上样量
【简答题】预备党员的预备期,从支部大会通过他为预备党员之日算起。党员的党龄,从( )算起。
【单选题】Where was the man arrested?
A.
In Brisbane
B.
In London
C.
In Glasgow
【简答题】以下程序输出的结果是【 】。 main() { int a=5,b=4,c=3,d; d=(a>b>c); printf('%d/n',d); }
【简答题】以下程序输出的结果是______。 mazn() { int a=5,b=4,c=3,d; d=(a>b>C) ; printf('%d/n',D) ; }
【简答题】思想政治学科的教学任务有哪些?
【单选题】You are the network administrator for Tailspin Toys. The company has a main office and two branch offices. The network in the main office contains 10 servers and 100 client computers. Each branch offi...
A.
Assign the main office and each branch office a new class A private IP address range.
B.
Assign the main office and each branch office a new class B private IP address range.
C.
Assign the main office and each branch office a subnet from a new class B private IP address range.
D.
Assign the main office and each branch office a subnet from the current class C private IP address range.
【简答题】以下程序输出的结果是【 】。 include <stdio.h> main() { int a=5,b=4,c=3,d; d=(a>b>c); printf('%d/n',d); }
【简答题】A woman was at the cinema, and she was enjoying the film very much. But there was a man in the next seat, and he began looking on the floor under him. The woman was angry and whispered, “What are you ...
【单选题】What can we infer from the dialogue?
A.
The man was in the wrong.
B.
The woman was in the wrong.
C.
The driver was in the wrong.
D.
None of the three was in the wrong.
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