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患者女性，24岁。腰背痛6年，开始时腰骶部疼痛后腰骶部痛减轻，背痛加重，并逐渐出现驼背畸形。实验室检查：血液检查RF、(-)，ASO250 U，ESR54mm/小时，HLA-B27(+)。初步诊断应首先考虑

A. 类风湿关节炎
B. DISH病
C. 强直性脊柱炎胸腰椎后凸畸形
D. 脊柱结核
E. 腰背肌劳损

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Listen to the conversation and circle the appropriate letter. Where is the examination location of mathematics

A. Room 801 of the No.4 Teaching Building
B. Room 108 of the No.5 Teaching Building
C. Room 108 of the No.4 Teaching Building

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Listen to the conversation and circle the appropriate letter. How can the students know the arrangement of examination locations of other subjects

A. From the website two months before the examinations
B. From the website a fornight before the examinations
C. From the notice board two weeks before the examinations

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Listen to the conversation and identify the following statements, TRUE(T), FALSE(F), or NOT GIVEN(N) Jack doesn’t want take the course of Object Matter.

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设二维随机变量（X，Y）在区域D：x2+y2≤9a2（a＞0）上服从均匀分布，p=P（X2+9Y2≤9a2），则（）．

A. p的值与a无关，且p=1/2
B. p的值与a无关，且p=1/3
C. p的值随a值的增大而增大
D. p的值随a值的增大而减少

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患者女性，24岁。腰背痛6年，开始时腰骶部疼痛后腰骶部痛减轻，背痛加重，并逐渐出现驼背畸形。实验室检查：血液检查RF、(-)，ASO250 U，ESR54mm/小时，HLA-B27(+)。初步诊断应首先考虑

A. 类风湿关节炎 B. DISH病 C. 强直性脊柱炎胸腰椎后凸畸形 D. 脊柱结核 E. 腰背肌劳损

Listen to the conversation and circle the appropriate letter. Where is the examination location of mathematics

Listen to the conversation and circle the appropriate letter. How can the students know the arrangement of examination locations of other subjects

Listen to the conversation and identify the following statements, TRUE(T), FALSE(F), or NOT GIVEN(N) Jack doesn’t want take the course of Object Matter.

设二维随机变量（X，Y）在区域D：x2+y2≤9a2（a＞0）上服从均匀分布，p=P（X2+9Y2≤9a2），则（）．

A. 类风湿关节炎
B. DISH病
C. 强直性脊柱炎胸腰椎后凸畸形
D. 脊柱结核
E. 腰背肌劳损