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燕子将自己做的摄影画册发在QQ群中,想买的人给她Q发红包,并私聊留下收货地址电话等。这属于电子商务。
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[音频]After a tough (1)__________ or a day full of physical activity, ifs common to find your muscles aching. But where do these pains come from? According to a German professor, the (2)__________ comes from straining your muscles in an uncommon way, for example, jumping on a bicycle for a ride, because you haven't ridden in a long time. Soreness (3)__________ since your leg muscles aren't used to that movement. When muscles (4)__________ an activity they aren't regularly (5)__________ to, the tiny fibres that are inside them are being tom apart. As muscle soreness develops, the body has to work to repair the muscle tears. But this doesn't happen immediately. First, the body must realise the muscles are (6)__________. When the body realises the muscles are hurt，the (7)__________ is to increase blood flow to the area and increase body heat. Damaged cells are then cleaned up and the body sends cells specially designed to break down the large muscle fibre (8)__________. Healing can take place after this. It takes about a day until these cells make it to your aching muscles. That's why there is most often a delay (9)__________ with muscle soreness. Repair of damaged cells takes about two days, and afterwards the soreness disappears. Unfortunately, there is little that can be done to relieve muscle soreness. Pain-relieving creams don't work, but a hot shower or warm bath can provide some (10)__________.
Complete the following sentences with the proper form of the words given in brackets.1. We are working on the_________ that the task will be finished at the end of the month. (assume)2. This event was held under the_________ of a large corporation. (sponsor)3. The committee members think high of the proposal and decide to provide_________ support. (finance)4. His wonderful skills and high scores make him a ________ football player of histime. (legend)5. These children are delightful___________, but when playing together, they give you a headache. (individual)6. His life philosophy holds that people are__________ good. (inherent)7. He resigned from the company in order to take a more ________ job. (challenge)8. Rudeness shows _________ and makes others angry. (respect)9. The company was created by two very ________ young men in the 1980s. (ambition)10. She was dressed by a ____________ New York designer. (lead)
一般而言，光电二极管与光电池不同之处有哪些：
雪崩型光电二极管的特点包括哪些：
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