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【多选题】
下列哪些因素可以导致手术室内燃爆事故的发生（）A.
可燃性全麻药
B.
水
C.
静电
D.
助燃剂
E.
可燃物质
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皮皮学刷刷变学霸
举一反三
【单选题】Reading good books for a few hours every day can make a ______to children. [ ]
A.
problem
B.
difference
C.
product
D.
harm
【单选题】You are looking for the bar, how do you ask for directions?
A.
Just a moment, please……luggage cart
B.
Excuse me, which way to the bar?
C.
There is a post office near here.
D.
Let me introduce some Chinese food for you.
【单选题】下列属于洋务运动失败的主观原因的是() 1外国侵略者、本国封建顽固派的反对、阻挠 2洋务运动具有封建性 3洋务运动对列强具有依赖性 4洋务企业的管理具有腐朽性
A.
②③④
B.
①③④
C.
①②④
D.
①②③
【单选题】I don’t think it to stay up late in the night and sleep until midday the next day.
A.
make a difference
B.
makes good sense
C.
makes trouble
D.
make profit
【简答题】设序列x(n)=2δ(n+1)+δ(n)-δ(n-1)，则X(e jω )| ω=0 的值为______。
【简答题】1) What are students’ improper behaviors in writing tests? 2) According to the lecture, what is the very first step to avoid straying from the topic? 3) In an English essay, which sentence usually s...
【单选题】The housing market has been for two years propping up consumers' spirits while the rest of the economy lies exhausted on the floor, still trying to struggle to its feet. According to the National Asso...
A.
the boom of real estate activity.
B.
the statistics on home prices.
C.
the role of housing market.
D.
the degree of consumer spirits.
【单选题】小明每天早上 7 : 50 从家里出发,到距家 1000 米的学校上学,每天行走速度为 80 米 / 分。一天小明从加出发 5 分钟后,爸爸以 180 米 / 分的速度去追小明,并且在途中追上了他。 爸爸追上小明用了多长时间?
A.
6分钟
B.
4分钟
C.
5分钟
D.
8分钟
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