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【单选题】
— Why do you always go to Lanzhou University on weekends? — Because there’re lots of great speakers I can practice English ________ in the English Corner there.A.
with
B.
to
C.
on
D.
about
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举一反三
【简答题】若某光栅的栅线密度为50线/mm，主光栅与指示光栅之间的夹角为θ=0.01rad，求其形成的莫尔条纹间距B H 是多少?
【简答题】简述莫尔条纹光学放大原理并回答下列问题。 若某光栅的栅线密度为50线/mm,主光栅与指示光栅之间的夹角为1.8°。 1求其形成的莫尔条纹间距BH是多少? 2莫尔条纹的宽度是栅距的多少倍?
【简答题】LCD 1602显示一个字符的操作过程为:首先 ,然后 ,随后 ,最后 。
【简答题】若某光栅的栅线密度为 50 线 /mm ,主光栅与指示光栅之间的夹角 θ =0.01rad ,求其形成的莫尔条纹间距 B H 是多少? 该光栅的位移分辨率是多少? 如需达到0.005mm分辨率,细分倍频应选多少?
【单选题】In 1976, after dropping out of college, Jobs started Apple with ____________.
A.
A manager at Hewlett Pachard
B.
His father
C.
His friend Steve Wozniak
【判断题】After dropping out of college, he took some classes he was interested in.
A.
正确
B.
错误
【简答题】若某光栅的栅线密度为 50 线 /mm ,主光栅与指示光栅之间的夹角 θ =0.01rad ,求其形成的莫尔条纹间距 B H 是多少?
【单选题】AFTER DROPPING THE PILOT means ________
A.
after boarding the pilot
B.
after the pilot leaving the ship
C.
after the pilot going on board
D.
after taking the pilot
【单选题】After dropping the pilot means _____
A.
after boarding the pilot
B.
after the pilot leaving the ship
C.
after the pilot going on board
D.
after taking the pilot
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