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【简答题】
在 100mL 0.20mol∙L -1 MgCl 2 溶液中加入等体积的含有 NH 4 Cl 的 0.20mol∙L -1 NH 3 ∙H 2 O ,未生成 Mg(OH) 2 沉淀,计算原 NH 3 ∙H 2 O 溶液的 pH 值和 NH 4 Cl 的物质的量。( K b θ (NH 3 ∙H 2 O)=1.8×10 -5 , K sp θ (Mg(OH) 2 )=5.6×10 -12 )
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举一反三
【简答题】Most of the people (invite) ______ to the dinner party yesterday were my friends.
【简答题】Besides supporting the family, men were also expected to ______________.
【单选题】If I ______ you, I ______invite him to go to see a movie.
A.
am;would
B.
were;will
C.
were;would
D.
was;will
【单选题】_____，there were also no lights in the houses along the street．
A.
There not only were no streetlights
B.
Not only there were no streetlights
C.
Not only were there no streetlights
D.
There were only no streetlights
【单选题】--Will you come to the party? ---__________ you also invite Blade.
A.
Why not
B.
Only if
C.
If not
D.
When
【单选题】If it were not for the fact that Anne _______ ill, I would invite her to answer my question now.
A.
was
B.
were
C.
is
D.
be
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