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【单选题】
可将交流电转变为直流电的设备为()A.
逆变器
B.
整流器
C.
变压器
D.
互感器
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举一反三
【单选题】溶菌酶 的抗菌机理是
A.
破坏肽 聚糖 聚糖 骨架的 β -1 ， 4 糖 苷 键
B.
抑制细菌的核酸代谢
C.
竞争 肽 聚糖合成中所需的转 肽 酶
D.
抑制细菌的酶活性
E.
损伤细菌细胞膜
【简答题】Scientists have been studying the reasons why some people don't like the taste of certain vegetables. They found that people inherit(遗传)some genes from their parents that cause them to like or dislike...
【简答题】From Monday to Friday most people are busy 1 or studying, but in the evenings and weekends they are free and relax themselves. Some watch television or go to the movies, others participate in sports. ...
【单选题】According to the passage, researchers at the University of Chicago are studying______.
A.
the reason of dreams
B.
the meaning of dreams
C.
what happens in dreams
D.
dreamers while they dream
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