题目内容

患儿男，8个月，因发热，腹泻稀水便1天入院。体检：T39.5℃，P136次/分，R34次/分，体重8kg，精神萎靡，呼吸稍促，唇干，前囟及眼眶凹陷，皮肤弹性欠佳，肢端凉，皮肤未见大理石花纹，心律齐，心音有力，双肺呼吸音清晰，腹不胀，肝肋下1cm，肠鸣音14次/分。入院时急需做的检查项目是（）

A. 血清钾、钠、氯、钙、镁
B. 血气分析
C. 血常规
D. 血糖
E. 心肌酶谱
F. 肝、肾功
G. 大便常规
H. 大便轮状病毒抗原

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Examine the structure of the STUDENTS table: STUDENT_ID NUMBER NOT NULL, Primary Key STUDENT_NAME VARCHAR2(30) COURSE_ID VARCHAR2(10) NOT NULL MARKS NUMBER START_DATE DATE FINISH_DATE DATE You need to create a report of the 10 students who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999. Which SQL statement accomplishes this task?（）

A. SELECT student_ id, marks, ROWNUM "Rank" FROM students WHERE ROWNUM <= 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course_id = 'INT_SQL' ORDER BY marks DESC;
B. SELECT student_id, marks, ROWID "Rank" FROM students WHERE ROWID <= 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course_id = 'INT_SQL' ORDER BY marks;
C. SELECT student_id, marks, ROWNUM "Rank" FROM (SELECT student_id, marks FROM students WHERE ROWNUM <= 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course_id = 'INT_SQL' ORDER BY marks DESC);
D. SELECT student_id, marks, ROWNUM "Rank" FROM (SELECT student_id, marks FROM students ORDER BY marks DESC) WHERE ROWNUM <= 10 AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99' AND course _ id ='INT _ SQL'

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