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【单选题】
在碘量法中一般采用淀粉作为指示剂，淀粉与I 3 - 离子形成深蓝色吸附化合物，此反应很灵敏，当I 2 的浓度为（ ）时，仍然能观察到蓝色。A.
1×10-3mol·L-1
B.
1×10-4mol·L-1
C.
1×10-5mol·L-1
D.
1×10-6mol·L-1
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【简答题】对幼儿影响较大的内分泌腺有( )、( )、( )、( )、( )。
【简答题】对幼儿影响较大的内分泌腺有( )、( )、( )、( )、( )。
【简答题】五、阅读理解(共10小题,每小题2分,共20分) (A) Welcome to the Little Rock Zoo! The little Rock Zoo is open very day of the week,all year round, EXCEPT Thanksgiving Day ,Chistmas Day and New Year's Day. Opening Hours :...
【单选题】The mother _____ her children from the kindergarten at 5:00 p.m. every day.
A.
picks up
B.
picks off
C.
puts up
D.
puts off
【单选题】The shop _____ from 8 am. to 5 p.m. every day but it _____ at 9:00 pm at weekends. [ ]
A.
opens; closes
B.
opens; is closed
C.
is open; closes
D.
is open; is closed
【判断题】Every day at 5 p.m., my brother and I would play with our fourth- and fifth-grade friends or sneak out to the empty lot to hunt ghosts and animal bones.
A.
正确
B.
错误
【简答题】对幼儿影响较大的内分泌腺有( )、( )、( )等。
【简答题】The Field Museum Hours Regular hours are 9:00 a.m.—5:00 p.m. , daily. Last admission at 4:00 p.m. Open every day except Christmas. Admission We have several ticket choices for you to choose from. Adva...
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