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【单选题】
关于宫内节育器下移脱落的原因及处理，下列选项错误的是A.
宫内节育器放置时未到，由于宫缩可能造成IUD脱落
B.
IUD下移，可造成带器妊娠
C.
IUD脱落多发生在带器后1年内，尤其前3个月
D.
经常增加腹压会造成IUD脱落
E.
一旦发现下移应立即取出宫内节育器
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【简答题】parallel resonant
【简答题】resonant frequency
【单选题】OBLIQUE : INDIRECT ::
A.
par : standard
B.
inherent : direct
C.
resonant : equitable
D.
justified : logical
E.
circular : animated
【单选题】What can be inferred from the passage?
A.
Twitter would like to make the word 'resonant' a popular buzzword.
B.
The ads that are resonated by most users are the best ones.
C.
Twitter's 'resonant' strategy is proved to be successful.
D.
Companies may run a risk if they pay for Twitter's ads.
【简答题】For LC parallel resonant circuit, what is the port property when it’s in resonant frequency?
【单选题】Because it is tuned a fifth lower, the viola produces a sound that is more resonant than that of the violin.
A.
more vibrant
B.
more harmonious
C.
softer
D.
sadder.
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