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【多选题】
外科感染的特点正确的是A.
感染多数与损伤或手术有关
B.
多数是单一感染，少数是混和感染
C.
大多有明显的局部症状和体征
D.
感染常集中在局部，也可发展为全身感染
E.
当药物不能控制感染时，需要手术治疗
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举一反三
【简答题】Only when the mother comes back the child will stop crying . A B C D
【单选题】To whom does the mother speak Korean?
A.
Her oldest daughter only.
B.
Her two daughters only.
C.
All of her children.
D.
Only to her son.
【多选题】“苯-甲苯”混合液,组成xf=0.40,经闪蒸分成组成分别为y与x的平衡汽、液相,汽、液相摩尔流量比为1/2,已知α=2.50,则x=_________,y=_________。
A.
0.3262
B.
0.4622
C.
0.5476
D.
0.6746
【简答题】Not only the children but also their mother (be) ______ playing the of hide-and-seek.
【单选题】If a mother is the only breadwinner of a family,
A.
boys need more cares from their mother.
B.
kids are easily adjusted to social lives.
C.
girls are less affected than boys.
D.
the father tends to leave the family.
【简答题】在一连续精馏塔中分离苯-甲苯混合液,进料流量为100 kmol/h,进料组成、塔顶馏出液的组成及塔釜釜残液的组成见下表(苯的摩尔分数,下同)。试求: (1)馏出液的流量和苯的回收率; (2)如保持馏出液组成不变,馏出液最大可能的流量; (3)如要保证苯的回收率在98%,计算此时釜残液的流量和组成 (4)如操作回流比为2.8,试求此时精馏段的操作线方程; (5)如相对挥发度为2.6,试求精馏段第二块...
【单选题】To whom does the mother speak Korean?
A.
Her+oldest daughter only．
B.
Her two daughters only．
C.
AU of her children．
D.
Only to her son．
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