蛲虫病的临床表现，哪项是其特征
A．食欲不振
B．精神烦躁
C．睡眠不安
D．肛门、会阴部奇痒
E．面黄肌瘦，腹痛恶心
参考答案：D
______ number of the students in their school is about two thousand, ______ of them are boys.
A．A; two thirds
B．The; two third
C．The; two thirds
D．A; two third
某工程发生费用偏差，在引起偏差的原因中，属于业主原因的有()。
A.图纸提供不及时
B.施工方案不当
C.建设手续不全
D.未及时提供场地
E.材料代用
