【单选题】检验滚珠大小的干涉装置示意如图 (a) . S 为光源, L 为会聚透镜, M 为半透半反镜.在平晶 T 1 、 T 2 之间放置 A 、 B 、 C 三个滚珠,其中 A 为标准件,直径为 d 0 .用波长为 l 的单色光垂直照射平晶,在 M 上方观察时观察到等厚条纹如图 (b) 所示.轻压 C 端,条纹间距变大,则 B 珠的直径 d 1 、 C 珠的直径 d 2 与 d 0 的关系分别为:
A.
d 1 = d 0 + l , d 2 = d 0 + 2 l .
B.
d 1 = d 0 - l , d 2 = d 0 - 2 l .
C.
d 1 = d 0 + l / 2 , d 2 = d 0 + l .
D.
d 1 = d 0 - l / 2 , d 2 = d 0 - l .
【单选题】Henry II was the first king of the Tudor dynasty.
【单选题】以静态的形象为主要信息载体的传播媒介是( )
【单选题】检验滚珠大小的干涉装置示意如图A. .S为光源,L为会聚透镜,M为半透半反镜.在平晶T 1 、T 2 之间放置A、B、C三个滚珠,其中A为标准件,直径为d 0 .用波长为λ的单色光垂直照射平晶,在M上方观察时观察到等厚条纹如图B. 所示.轻压C端,条纹间距变大,则B珠的直径d 1 、C珠的直径d 2 与d 0 的关系分别为:
A.
d 1 =d 0 + ,d 2 =d 0 +2 .
B.
d 1 =d 0 - ,d 2 =d 0 -2 .
C.
d 1 =d 0 + /2,d 2 =d 0 + .
D.
d 1 =d 0 ˉ /2,d 2 =d 0 - .
【单选题】Henry ______ founded the Tudor Dynasty, and the English Renaissance started.
【判断题】Henry VII ended the Wars of the Roses and founded the Tudor Monarchy.
【单选题】Henry ______ founded the Tudor Dynasty.
【单选题】听力原文:M: Henry earned a lot of money over the summer as a consultant for that agency. W: I don't doubt it. What surprises me is that he is still working there. Now the classes have started. Q: What doe...
A.
She doubts he makes much money now.
B.
She doesn't know when his classes started.
C.
She's surprised he chose that agency.
D.
She wonders why he's kept his job.
【判断题】英国人思维严谨,规矩一旦定了,就不会改变。()