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【单选题】
有关妊娠期保健措施，正确的是A.
产前检查应从妊娠20开始
B.
产前检查应每月一次
C.
血压较基础压增高30/15mmHg为异常
D.
无浮肿的孕妇不需要常规测体重
E.
孕妇不需要测身高
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举一反三
【简答题】若集合A={1，x 2} ，集合B={1，3，x}，且A∪B={1，3，x}，则x=______．
【简答题】若集合A={x|x 2 -1＜0}，集合B={x|x＞0}，则A∩B=______．
【简答题】It involves getting the right to the right at the right , in the right and at the right , at the lowest total cost possible.
【单选题】Buying the right products, at the right price, from the right source, at the right specifications, in the right quantity, for delivery at the right time to the right internal customer is associated wi...
A.
managing the supply base
B.
managing the purchasing process effectively and efficiently
C.
supporting operational requirements
D.
supporting organizational goals and objectives
【简答题】In China, traffic keeps to the right. Cars, trucks, buses bikes must all keep to the right side of the . In most other countries, traffic to the left. How can you the roads safer? you cross the road, ...
【简答题】若集合A={x|log a （x 2 -x-2）＞2，a＞0且a≠1}． （1）若a=2，求集合A； （2）若 9 4 ∈A ，求a的取值范围．
【简答题】若全集U=R，集合A={x|x＞1}，B={x|x＞2}，则集合A∩（? U B）=______．
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