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【简答题】
Jack hoped to come again soon． Jack hoped that he ______ again soon．
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举一反三
【单选题】某交流用电器的额定电压为 220 V ,额定频率为 50Hz ,其两侧应加上 ________ 电压,方能保证用电器的正常工作。
A.
220 sin314t (V)
B.
220 sin50t (V)
C.
220√2 sin314t (V)
D.
220 √2 sin50t (V)
【单选题】某交流用电器的额定电压为220 V 、额定频率为50 Hz ,其两端加上下列哪种正弦电压,会保证其正常工作______。
A.
220 sin（ 314t +45º ）V
B.
220 sin（ 314t +45º ）V
C.
380 sin（ 314t +45º ）V
D.
220 sin（50 t +45º ）V
【单选题】It was during ______ when the English navy defeated the Spanish Armada.
A.
the Middle Ages
B.
the 16th century
C.
the Elizabethan age
D.
the Wars of the Roses
【单选题】Which of the following is not the French word borrowed into English during the Middle Ages?
A.
sergeant
B.
battle
C.
spy
D.
fight
【简答题】The English Renaissance is a period during which______introduced the Petrarchan sonnet into England.
【单选题】某交流用电器的额定电压为 220V 、额定频率为 50Hz ,其两端加上下列哪种正弦电压,会保证其工作正常?
A.
u=-220 sin314tV
B.
u=220sin314tV
C.
u=380sin314tV
D.
u=-220 sin50tV
【简答题】Explain the 'Puritanism' during the English Revolution.
【简答题】 During the summer of 2009,I started reading books in English,mostly stories.I would learn a lot of new 1. words from these books,but I had terribly problems ...
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