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【单选题】
图例为架空双层硬木地板面层铺设构造图,方框中入()
A.
50*50木龙骨
B.
90*90木龙骨
C.
80*80木龙骨
D.
70*70木龙骨
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【单选题】What does the phrase 'to keep its feet to the fire' in the last paragraph mean?
A.
To place Apple's feet close to the fire.
B.
To pressure Apple into intensifying its competition
C.
To force Apple to dance hard on the fire.
D.
To advise Apple to strategically drop its side products.
【单选题】给家兔静脉注射 20% 葡萄糖 5ml,尿量增加的主要原因是
A.
肾小球有效滤过压升高
B.
血浆晶体渗透压升高
C.
小管液渗透压升高
D.
ADH 分泌增多
E.
醛固酮分泌增多
【多选题】下列有关工程网络计划的叙述,正确的是()。
A.
总时差为零的工作为关键工作
B.
关键线路上允许有虚工作和波形线的存在
C.
网络计划中以终点节点为完成节点的工作,自由时差与总时差相等
D.
自由时差为零时,总时差必为零
E.
除了以网络计划终点为完成节点的工作,其他工作的最迟完成时间应等于其紧后工作最迟开始时间的最小值
【单选题】What does the underlined word“collapsed” probably mean? ( )
A.
Were destroyed
B.
Caught fire
C.
Were flooded
D.
Sank
【多选题】下列有关工程网络计划叙述正确的是( )。
A.
总时差为零的工作为关键工作
B.
关键线路上允许有虚工作和波形线的存在
C.
网络计划中以终点节点为完成节点的工作,自由时差与总时差相等
D.
自由时差为零时,总时差必为零
E.
除了以网络计划终点为完成节点的工作,其他工作地最迟完成时间应等于其紧后工作最迟开始时间的最小值
【单选题】What kind of information does the fire plan contain?
A.
 Location of firefighting equipment onboard
B.
How to use firefighting equipment onboard
C.
 Information on how handle different types of fires
D.
 Fire alarm signal, fire instruction and your assignment
【单选题】What kind of information does the fire control plan contain?
A.
Fire alarm signal, fire instruction and your assignment.
B.
Location of firefighting equipment onboard
C.
How to use firefighting equipment onboard
D.
Information on how to handle different types of fire.
【单选题】What does FIRE procedure mean?
A.
Find, isolate, report and extinguish.
B.
Fire, isolate, repeat and extinguish.
C.
Find, isolate, repeat and extinguish.
D.
Fire, isolate, raise alarm and extend.
【简答题】等边三角形ABC的边长为2,D是BC的中点,PA垂直AB,PA垂直AC,且PA=2,求PD与平面ABC所成角度正切值
【单选题】在等边三角形ABC中,CD是∠ACB的平分线,过D作DE ∥ BC交AC于E,若△ABC的边长为a,则△ADE的周长为(  )
A.
2a
B.
4 3 a
C.
1.5a
D.
a
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