What can not be inferred from the dialogue?
A. The young man and the young woman are schoolmates.
B. The young man and the young woman met for the first time.
C. The young woman is better at remembering names than the young man.
D. The young woman is having a class in the morning.
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Britain takes completely the opposite view. We think the growth of China is a huge(1) _______for the Chinese people, for the world(2)_______ ,and for the British people, too, if we trade more with China, invest more in China, welcome Chinese(3)_________, students and companies into our country. I've been having a meeting with Jack Ma of the Alibaba.I want more British businesses, and luxurious brands to be(4) ______ on their websites,so that as Chinese people become wealthier they can buy the British goods, the British(5)_______. They can enjoy British television programs, British movies. And it is worth remembering that China has brought more people out of(6)______ more quickly than any other country in the world. So this model of growth, of a market growth is the right one to lift people out of poverty.
3.Passage :Getting around the worldListen to the passage again and then complete the following sentences[音频][音频]1. Bowing is the traditional______________ in some Asian countries like Korea and Japan .2. When ______ friends meet in Russia , both men and women hug each other.3. Shaking hands is common in many countries. But it isn’t _____ done the same way.4. In many ______ , people also shake hands. But they do it differently from the way they do in the U.S. and Canada.5. Many people in Mexico and in Egypt ______. And their handshakes usually _______ a little longer but are softer.
把双缝干涉实验装置放在折射率为n的水中,两缝间距离为d,双缝到屏的距离为D (D >>d),所用单色光在真空中的波长为λ,则屏上干涉条纹中相邻的明纹之间的距离是
A. 2nλD/d
B. nλd/D
C. nDd/λ
D. λD/(nd)
双缝干涉实验中,为使屏上的干涉条纹间距变小,可以采取下面哪种办法
A. 使屏远离双缝
B. 使两缝的间距变小
C. 把两个缝的宽度稍微调宽
D. 改用波长较小的单色光源