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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Losing Weight Girls as young as 10 years old are dieting and in danger of developing unhealthy attitudes to weight, body image and food, a group of Toronto researchers reported Tuesday. Their study of...
A.
had unhealthy attitudes to weight.
B.
were overweight.
C.
were on a diet.
D.
had healthy weights.
【单选题】女性，40岁。左侧腮腺区剧烈的持续性跳痛3天。1周前曾做过胃大部切除术。检查见：腮腺区以耳垂为中心肿胀明显，耳垂被上抬，皮肤发红、水肿，触痛明显。导管口明显红肿，轻压有脓液自导管口溢出。体温40℃，脉搏、呼吸增快，血白细胞总数和中性粒细胞计数明显增加。初步诊断为：（）
A.
慢性阻塞性腮腺炎
B.
慢性复发性腮腺炎
C.
急性化脓性腮腺炎
D.
舍格伦综合征继发感染
E.
流行性腮腺炎
【单选题】在列写结点电压法时,自导___,互导___。下列叙述正确的是( )。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
恒为正，有正、负
B.
恒为正，恒为负
C.
有正、负，恒为负
D.
恒为负，恒为正