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【简答题】
_____ to understand or realize that sth is true. 2._____ to tell sb that you are pleased about their success or achievement. 3.______ thoughtful of the rights or feelings of others. 4.______ to show clearly 5._____ covered with oil or fat 6.______lack of interest or concern 7.______a collection of information shown in numbers 8.______ pretending to have moral standards or opinions that don’t have 9.______ not married or engaged; still single 10______ to push sth. closely and firmly against sth 11.______ to press firmly inward or from the opposite side 12._____ a person who believes that people of his own race are better than others.
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【单选题】在BaSO4饱和溶液中，加入Na2SO4(s)，达平衡时
A.
c (Ba 2+ )= c (SO 4 2- )
B.
c (Ba 2+ )= c (SO 4 2- )=[ K θsp (BaSO 4 )] 1/2
C.
c (Ba 2+ ) ¹ c (SO 4 2- ) ， [ c (Ba 2+ )/ c θ ] · [ c (SO 4 2- )/ c θ ]= K θsp (BaSO 4 )
D.
c (Ba 2+ ) ¹ c (SO 4 2- ) ， [ c (Ba 2+ )/ c θ ] · [ c (SO 4 2- )/ c θ ] ¹ K θsp (BaSO 4 )
【简答题】在BaSO 4 溶液中，加入适量的Na 2 SO 4 来抑制BaSO 4 的溶解，这种作用称为______。
【单选题】计算机的三大总线包括______。
A.
数据总线、地址总线和指令总线
B.
数据总线、指令总线和控制总线
C.
数据总线、地址总线和控制总线
D.
程序总线、地址总线和控制总线
【简答题】在BaSO 4 沉淀平衡系统中加入BaCl 2 溶液，主要是______效应，BaSO 4 溶解度______；如果加入NaCl溶液，主要是______，BaSO 4 溶解度______。
【单选题】在 BaSO 4 饱和溶液中,加入 Na 2 SO 4 固体粉末,达平衡时( )
A.
c ( Ba 2+ ) = c ( SO 4 2- )
B.
c ( Ba 2+ ) = c ( SO 4 2- ) = 1/2 [ ( BaSO 4 ) ]
C.
c ( Ba 2+ ) ¹ c ( SO 4 2- ) ， [ c ( Ba 2+ ) / ] · [ c ( SO 4 2- ) / ] = ( BaSO 4 )
D.
c ( Ba 2+ ) ¹ c ( SO 4 2- ) ， [ c ( Ba 2+ ) / ] · [ c ( SO 4 2- ) / ] ¹ ( BaSO 4 )
【简答题】在BaSO 4 饱和溶液中加入少量BaCl 2 稀溶液，产生BaSO 4 沉淀，若以 表示BaSO 4 的溶度积常数，则平衡后溶液中( )。 (A) (B) ， (C) ， (D) ，
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