停工期间，承包人应工程师要求，留在施工场地的必要的管理人员及保卫人员的费用由( )承担。
A. 承包人
B. 发包人
C. 工程师
D. 施工人员
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The little boy was on the ______ of tears when his teacher asked him what he had done.
A. verge
B. fringe
C. margin
D. rim
肝硬化腹水病人进水量应限制在每日( )
A. 400ml
B. 600ml
C. 800ml
D. 1000ml
E. 1200ml
Laying claim to DNA stretches can be careless genetics because ______.
A. those who patent gene fragments are not qualified geneticists
B. the same gene fragments are often patented by different scientists
C. geneticists have no idea what they are going to do with patented genes
D. some of the gene fragments patented contain no real genetic information
不可抗力发生后，承包人应在力所能及的条件下迅速采取措施，尽可能减少损失，并在不可抗力事件发生过程中，每隔( )向工程师报告一次受害情况。
A. 4d
B. 5d
C. 7d
D. 8d
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