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【单选题】
以下( )是行政单位的主要收入预算来源。A.
财政拨款预算收入
B.
事业预算收人
C.
经营预算收人
D.
债务预算收入
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【简答题】为什么自花授粉的四倍体植物比自花授粉的二倍体植物子代隐性表型的频率低？
【简答题】为什么白花授粉的四倍体植物比自花授粉的二倍体植物子代隐性表型的频率低?
【简答题】按两构件之间相对运动特征的不同,低副可分为 、 和 。
【单选题】Libraries develop with times. They have changed greatly since decades ago. ___4___ Some libraries have apps so you can see when your books are due back and even reserve books in some cases. There are ...
A.
Libraries help people learn.
B.
Libraries help educate the kids.
C.
They create a great sense of community.
D.
You can go in, settle down and read a book without being charged a penny.
E.
Most libraries now have computers and allow people to borrow CDs and DVDs.
F.
Libraries help us save money as we’re borrowing books rather than buying them.
G.
For others, particularly the homeless and people in poverty, a lifeline to the world.
【简答题】为什么自花授粉的四倍体植物比白花授粉的二倍体植物子代隐性表型的频率低
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