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【多选题】为什么“爱国者”导弹能比较轻易 地击毁 “飞 毛腿 ”导弹?这得益于前者精确制导系统的出色工作。其制导系统中使用了大约 4kg 的( ) 用于电子束聚焦。
A.
钐钴磁体
B.
钕铁硼磁体
C.
高温超导磁储能器
D.
高温超导器件
【简答题】集成运算放大器的两个输入端分别为 输入端和 输入端。
【单选题】Why does a lack of sleep cause people to gain weight?
A.
Because people burn fewer calories when they are awake.
B.
Because people feel hungry when they lack sleep.
C.
Because their hormones stay unchanged.
D.
Because people don't exercise when they don't have enough sleep.
【简答题】集成运算放大器的两个输入端分别为_________端和________端,前者的极性与输出端_______;后者的极性同输出端_______。
【单选题】Why does it take long for people to change their food?
A.
Because labs are not easily accessible to researchers.
B.
Because some people are reluctant to accept the new diet.
C.
Because food consumption is a culture of conservation.
D.
Because some scientists are against the growing lab meat.
【简答题】According to the text, why does the same deafness afflict the same people? [ A] Because governments all turned theirattention to these people. [ B] Because these people are more likelyto have unhealth...
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