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【单选题】
关于简谐振动的能量,下列说法正确的是
A.
与振幅成正比;
B.
与频率成正比;
C.
动能和势能随时间做周期性变化;
D.
简谐振动的能量是守恒的.
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参考答案:
举一反三
【单选题】FOB and CFR share one thing that ( ).
A.
risk is transferred when the goods are loaded on board the vessel
B.
they can be used in any mode of transport
C.
the seller will be responsible for the unloading at the port of destination
D.
the seller will be responsible for the carriage
【单选题】FOB and CFR share one thing that ( ).
A.
risk is transferred when the goods are loaded on board the vessel
B.
the seller will be responsible for the unloading at the port of destination
C.
they can be used in any mode of transport
D.
none of the above
【单选题】一个队列的进队列顺序是1,2,3,4,则出队列顺序为(    )。
A.
4,3,2,1    
B.
2,4,3,1    
C.
1,2,3,4
D.
3,2,1,4
【简答题】Match the compound words ( 搭配复合词 )
【单选题】●一个队列的进队列顺序是1,2,3,4,则出队列顺序为 (37) 。 (37)
A.
4,3,2,1
B.
1,2,3,4
C.
2,4,3,1
D.
3,2,1,4
【单选题】FOB and CFR share one thing that ( ).
A.
he seller will be responsible for the unloading at the port of destination
B.
they can be used in any mode of transport
C.
risk is transferred when the goods are loaded on board the vessel
D.
none of the above
【单选题】FOB and CFR share one thing that ( ).
A.
risk is transferred when the goods are loaded on board the vessle
B.
they can be used in any mode of transport
C.
the seller will be responsible for the unloading at the port of destination
D.
none of the above
【判断题】冰皮月饼放在冰箱里冷藏一段时间,口感更好对吗?
A.
正确
B.
错误
【单选题】一个栈的进栈顺序是1,2,3,4,则出栈顺序为( )。
A.
4,3,2,1
B.
2,4,3,1
C.
1,2,3,4
D.
3,2,1,4
【多选题】关于治理的说法哪些是正确的:
A.
包括正式机构
B.
包括非正式的安排
C.
包括正式机制
D.
不包括非正式的安排
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