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【多选题】
以下关于驻波的描述中,正确的是A.
驻波属于特殊干涉
B.
波节对应干涉
C.
驻波中的各点具有相同的振动频率
D.
驻波中的各点具有相同的相位
E.
驻波中的各点具有不同的振幅
F.
驻波和行波一样，也有振动状态的传播
G.
驻波不传播能量
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举一反三
【简答题】A．To improve themselves. B．To prepare to return to the job market. C．To learn a variety of subjects and skills. D．To try to qualify themselves for better jobs.
【单选题】We started to find_______managers who have excelled in a variety of market environments over a long period of time.
A.
missing
B.
opposing
C.
experienced
D.
significant
【单选题】Every product on the market has a variety of costs built into it before it is ever put up for sale to a customer. There are costs of production, transportation, storage, advertising, and more. Each of...
A.
reducing cost is the surest way to increase profits
B.
profits depend on how fast goods are moving
C.
fair markup promise the greatest profits
D.
lower markup brings reasonable profits
【单选题】The consumer market ________ a wide variety of electronic goods.
A.
is mingled with
B.
is endowed with
C.
is saturated with
D.
is engaged with
【单选题】There is a large variety of commodities on the market. Nothing is ___ .
A.
scarce
B.
rare
C.
short
D.
few
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