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【简答题】
We will be marching today for ______________________ gun laws, but we will not stop with just ____________. We will keep walking; we will keep running; we will keep marching; we will keep fighting and we will keep ________________until we are successful in our fight to keep our children ____________.
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皮皮学刷刷变学霸
举一反三
【单选题】It is surprising that this innocent looking person should have_____such a crime.
A.
acted
B.
committed
C.
finished
D.
performed
【简答题】数码管动态显示扫描的原理是利用了发光二极管的余晖和人眼的___________效应
【单选题】下列物质中,不能直接配制标准溶液的是( )
A.
K 2 Cr 2 O 7
B.
H 2 C 2 O 4 ·2H 2 O
C.
硼砂
D.
KMnO 4
E.
邻苯二甲酸氢钾
【简答题】动态显示利用了人眼的 效应。