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【单选题】
24-28病人女性,45岁,近半年来无明显诱因出现粘液,脓血便,粪便次数增多,每日4~5次,有时有排便不尽感,但无腹痛。曾与当地医院按“慢性菌痢”治疗无效。发病以来体重下降3kg。26.对该病人术前作肠道准备的方法中错误的是A.
术前3日内皆渣半流质饮食
B.
术前3日内口服肠道抗生素
C.
术前3日内口服维生素K
D.
术前1日口服缓泻剂
E.
术前1日晚及术日晨清洁灌肠
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【简答题】13,The price of treasuries rises as interest rates fall, and the opposite is true when interest rates rise. Therefore, the best time to buy treasuries is when interest rates are relatively ______. (...
【单选题】When interest rates rise:
A.
the cost of investing rises, and businesses buy less equipment and structures.
B.
the return on investments rises also, and businesses eager to lock in future profits increase their investments.
C.
consumers are encouraged to save, and the automatic relationship between savings and investment leads to an increase in investment.
D.
investment tax credits kick in to maintain a steady level of investment.
【简答题】已知x：y=2：3，则y：x=______．
【简答题】已知x：y=3：2，则（x+y）：y=______．
【判断题】任何一个网络，任何一台服务器都不会为用户提供无限大的磁盘空间。因为一个文件系统的磁盘窨使用率超出95%时，系统就不会正常工作，系统效率就极大下降。()
A.
正确
B.
错误
【简答题】已知3x+y=3，用x表示y，则y=______．
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