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【简答题】
(1)向NaHSO 4 溶液中,逐滴加入Ba(OH) 2 溶液至中性,写出发生反应的离子方程式:______在以上中性溶液中,继续滴加Ba(OH) 2 溶液,写出此步反应的离子方程式:______. (2)向Ba(OH) 2 溶液中,逐滴加入NaHSO 4 溶液至恰好不再生成沉淀为止,写出反应的离子方程式:______.在以上溶液中,继续滴加NaHSO 4 溶液,写出此步反应的离子方程式:______.
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举一反三
【单选题】图中两个箭头之间所指示的上皮属于哪种上皮组织 ?
A.
单层扁平上皮
B.
单层立方上皮
C.
单层柱状上皮
D.
复层扁平上皮
E.
复层柱状上皮
【多选题】unit6 sectionB 词汇 Fill in the blanks with the words given below. Change the form where necessary. Each word can be used only once. penetrate; specify; distribute; render ,controversy ;highlight ;subtr...
A.
concerning
B.
specified
C.
controversy
D.
rendered
E.
enforced
F.
distribute
G.
highlighted
H.
implication
I.
penetrating
J.
substract
【单选题】图中箭头所指示的细胞属于哪种上皮组织 ?
A.
单层扁平上皮
B.
单层柱状上皮
C.
单层立方上皮
D.
复层扁平上皮
E.
复层柱状上皮
【多选题】U2-3 Fill in the blanks with the words given below. Change the form where necessary. Each word can be used only once. boost,  prospect, calculate accelerate,  promote, mystery destruction,  analysis, ...
A.
promotes
B.
accelerate
C.
mystery
D.
insight
E.
boost
F.
analysis
G.
calculate
H.
barriers
I.
destruction
J.
prospect
【单选题】Napping is one of the best, most underused tools for busy people. It is frowned 【C1】______ by many people and is viewing as something for the elderly and children. Mention napping and you could be see...
A.
in
B.
into
C.
upon
D.
of
【单选题】图中两个箭头之间所指示的上皮属于哪种上皮组织 ?
A.
单层扁平上皮
B.
单层立方上皮
C.
单层柱状上皮
D.
复 层扁平上皮
E.
复层柱状上皮
【单选题】图中箭头所指示的细胞属于哪种上皮组织 ?
A.
单层扁平上皮
B.
单层柱状上皮
C.
单层立方上皮
D.
复层扁平上皮
E.
复层柱状上皮
【简答题】Young people and older people do not agree. 小题1: But in one special programme in New York State, grown-ups and agers live together in a friendly way. Each summer 2000 agers and 50 grown-ups li...
【单选题】It’s reported that one thousand people are affected by the H1N1 flu virus in that area , two hundred and fifty-five children ____.
A.
were included
B.
including
C.
include
D.
included
【单选题】图中箭头所指示的细胞属于哪种上皮组织 ?
A.
单层扁平上皮
B.
单层立方上皮
C.
单层柱状上皮
D.
复层扁平上皮
E.
复层柱状上皮
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