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( )当老人上消化道大量出血时，可出现休克状态。
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当采用标准UML构建系统类模型(Class Model)时，若类B除具有类A的全部特性外，类B还可定义新的特性以及置换类A的部分特性，那么类B与类A具有 (46) 关系；若类A的对象维持类B对象的引用或指针，并可与类C的对象共享相同的类B的对象，那么类A与类B具有 (47) 关系。
( )一个爽朗、乐观、外向的人突然变得沉闷、悲观、内向，就要考虑他是否心理偏离正常轨道。
Passage TwoJessica Bucknam shouts "tiao! "(tee—ow) and her fourth-grade students jump."Dun!"(doo—wen) she commands, and they crouch(蹲). They giggle(吃吃地笑) as the commands keep coming in Mandarin Chinese.Half of the 340 students at the K-5 school are enrolled in the program. They can contine studying Chinese in middle and high schools. The goal.. to speak like natives.About 24,000 American students are currently learning Chinese. Most are in high schools. But the number of younger students is growing in response to China’s emergence as a global superpower."China has become a strong partner of the United States," says Mary Patterson, Woodstock’s principal. "Children who learn Chinese at a young age will have more opportunities for jobs in the future."Isabel Weiss, 9, isn’t thinking about the future. She thinks learning Chinese is fun. "when you hear peo- ple speaking in Chinese, you know what they’re saying,’ she says. "And they don’t know that you know. ’ What do the fourth-grade students seem to be doing in the first paragraph ？（）
[听力原文]6-7W: Good morning Lin. Are you going back to your hometown Hunan for Spring FestivalM: I intend to spend my festival here in Guangzhou.W: Well, you can come to the New Year party for students from other provinces on campus.M: That must be excellent! When and where will the party be givenW: January 14th, at the Arts Center.M: Thank you. I think that would be a wonderful night!W: You’re welcome. See you. What kind of students would be invited to the party（）
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