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【单选题】
有一个用余弦函数表示的振动,若其位移 x 与时间t 的关系曲线如图所示,则该振动的初相位为A.
π/6
B.
5π/3
C.
π/2
D.
2π/3
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举一反三
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A.
at
B.
on
C.
in
D.
for
【单选题】— ________________ — My birthday is October twenty-second. [ ]
A.
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B.
When is your birthday?
【简答题】选择对应的汉语翻译。 ( ) 1. What colour is it? ( ) 2. This is a yellow marker. ( ) 3. When is your birthday? ( ) 4. How tall are you? ( ) 5. I don't know. ( ) 6. Stand on your feet. ( ...
【简答题】皮亚杰将儿童道德认知发展分为( )、( )、( )三个阶段。
【单选题】皮亚杰将儿童道德认知发展分为 ( )。
A.
前道德阶段、他律道德阶段、普世道德阶段
B.
无道德阶段、他律道德阶段、社会约定阶段
C.
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D.
自律道德阶段、普世道德阶段、他律道德阶段
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