【简答题】出化合物结构简式: 蚁酸----; 醋酸 -----; 草酸-----; 醋酸酐------。
【单选题】In the passage the writer mainly talks about ______.
B.
her growth from an innocent child to a learned woman
C.
the benefits of reading
D.
the difference between childhood dreams and life's realities
【单选题】The writer quotes from the Worldwide Fund for Nature to illustrate __________.
A.
how influential the mass media can be
B.
how effective environmental groups can be
C.
the mass media can help groups raise funds
D.
environmental groups can exaggerate their claims
【判断题】激光束的速度为3×10 8 米/秒。( )
【单选题】输液(血)器及输液附加装置的更换不符合要求的是()
A.
输液器应每24h更换1次,污染或怀疑污染或完整性受到破坏时,应立即更换
B.
用于输全血、成分血或生物制剂的输血器宜每4h更换一次
C.
外周静脉留置针附加的肝素帽或无针接头宜随外周静脉留置针一起更换
D.
PICC、CVC、PORT附加的肝素帽或无针接头至少应每天更换
E.
肝素帽或无针接头内有血液残留或完整性受损或取下后,应立即更换
【单选题】The writer quotes what Ian Whitworth, marketing director of staging connections says in order to _______
A.
distract visitors' undivided attention
B.
emphasize the importance of stand design
C.
justify one advantage of exhibition over other more traditional communication techniques
D.
outline the weakness of exhibition
【多选题】下述因素中,影响乙醇水溶液分离效果的是()。
【多选题】输液(血)器及输液附加装置的更换要求是()
A.
输液器应每24h更换1次,污染或怀疑污染或完整性受到破坏时,应立即更换
B.
用于输全血、成分血或生物制剂的输血器宜每4h更换一次
C.
外周静脉留置针附加的肝素帽或无针接头宜随外周静脉留置针一起更换
D.
PICC、CVC、PORT附加的肝素帽或无针接头至少应每7天更换
E.
肝素帽或无针接头内有血液残留或完整性受损或取下后,应立即更换