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一电焊学徒工，无防护条件下电焊操作半天后，次日出现眼痛、流泪、怕光。检查见球结合膜充血、水肿。 此病人应诊断为
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患者，女，40岁，先天性主动脉瓣狭窄，PDE示中度狭窄。 该患者有典型的主动脉瓣狭窄三联症，除了呼吸困难，心绞痛外，还包括
Hairdresser: How would you like to do your hair today？The same style as usual？Mrs. Lee: I have a special party to attend tonight, and I’d like to change styles.Hairdresser: Very well. You’re not in a hurry, are you？Mrs. Lee: No.（）.
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Sporting activities are essentially modified forms of hunting behavior. Viewed biologically, the modem foot-bailer is in reality a member of a hunting group. His killing weapon has turned into a harmless football and his prey (猎物) into a goalmouth. If his aim is accurate and he scores a goal, he enjoys the hunter’s triumph of killing his prey.To understand how this transformation has taken place we must briefly look back at our forefathers. They spent over a million years evolving as cooperative hunters. Their very survival depended on success in the hunting-field. Under this pressure their whole way of life, even their bodies, became greatly changed. They became chasers, runners, jumpers, aimers, throwers and prey-killers. They cooperated as skillful male-group attackers.Then about ten thousand years ago, after this immensely long period of hunting their food, they became farmers. Their improved intelligence, so vital to their old hunting life, was put to a new use--that of controlling and domesticating their prey. The hunt became suddenly out of date. The food was there on the farms, awaiting their needs. The risks and uncertainties of the hunt were no longer essential for survival. For over a million years, our forefathers were basically（）.
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