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脊柱术后护理有哪项不是
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徐悲鸿的《奔马》是一幅______作品。( )
Many teachers believe that the responsibilities for learning lie with the student. (1) a long reading assignment is given, instructors expect students to be familiar with the (2) in the reading even if they do not discuss it in class or take an examination. The (3) student is considered to be (4) who is motivated to learn for the sake of (5) , not the one interested only in getting high grades. Sometimes homework is returned (6) brief written comments but without a grade. Even if a grade is not given, the student is (7) for learning the material assigned.When research is (8) ,the professor expects the student to take it actively and to complete it with (9) guidance. It is the (10) responsibility to find books, magazines, and articles in the library. Professors do not have the time to explain (11) a university library works; they expect students, (12) graduate students, to be able to exhaust the reference (13) in the library. Professor will help students who need it, but (14) that their students should not be (15) ,dependent on them. In the United States professors have many other duties (16) teaching, such as administrative or research work. (17) ,the time that a professor can spend with a student outside of class is (18) .If a student has problems with classroom work, the student should either , (19) a professor during office hours (20) make an appointment. 8（）
下列哪一项是左半结肠癌的临床症状
诊断原发性下肢深静脉瓣膜功能不全最可靠的检查方法为
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