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【单选题】
A linear variable cost-when the vertical axis represents cost incurred.A.
Graph1
B.
Graph2
C.
Graph 4
D.
Graph 5
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举一反三
【单选题】I try to make him understand that I’m not interested in him ,but he never gets the .
A.
． information
B.
． news
C.
． message
D.
． word
【单选题】You must try _____ . [ ]
A.
making us to understand
B.
to make us to understand
C.
to make us understand
D.
make us understand
【单选题】Hard as a teacher may try, he can’t ______to make all his stu dents make a difference in study, letting alone in life.
A.
make sure
B.
be sure
C.
guarantee
D.
insure
【简答题】Titanic did not try to make a full speed crossing for fear of the risk of ______.
【单选题】净空高度是指
A.
从船底平板龙骨下缘至船舶最高点之间的垂直距离
B.
船舶当时的实际水线面至船舶最高点之间的垂直距离
C.
从船底平板龙骨上缘至船舶最高点之间的垂直距离
D.
满载吃水线至船舶最高点之间的垂直距离
【简答题】按心脏震颤出现的时期,可分为 、 和 。
【简答题】桥下净空高度是指（ ）。
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