质监机构应当建立健全公路水运工程试验检测活动监督检查制度，对检测机构进-我要搜题网

[多选题]制动缸缓解不良主要原因有：（）。
A.皮碗直径大或因皮碗耐油性差，发生膨胀，直径增大
B.制动缸缺油、生锈，制动缸内的润滑脂在冬季低温下凝固
C.活塞杆弯曲，使它与制动缸前盖上的活塞杆孔发生抵触
D.缓解弹簧折断或弹力过弱

[判断题]在带电设备附近进行立撤杆工作，杆塔、拉线与临时拉线应与带电设备保持表19所列安全距离，且有防止立、撤杆过程中拉线跳动和杆塔倾斜接近带电导线的措施。
A.正确
B.错误

[不定项选择题]共用题干 What is the Coolest Gas in the Universe?

What is the coldest air temperature ever recorded on Earth?Where was this low temperature recorded ?
The coldest recorded temperature on Earth was －91℃, which_____ (51) in Antarctica（南极洲）
in 1983.
We encounter an interesting situation when we discuss temperatures in_________(52).Temperatures
in Earth orbit（轨道）actually range from about +120℃ to －120℃. The temperature depends upon
______(53)you are in direct sunlight or in shade.Obviously，－120℃ is colder than our body can
________ (54)endure.
The space temperatures just discussed affect only our area of the solar________(55).Obviously,it
is hotter closer to the Sun and colder as we travel__________(56)from the Sun,Scientigtg egtimate tern-
peratures at Pluto are about －210℃．How cold is the lowest estimated temperature in the entire universe?
Again,it depends upon your_________(57).We are taught it is supposedly__________(58)to have a
temperature below absolute zero,which is－273℃，at which atoms do not move.Two scientists,Cornell
and Wieman,have successfully______(59)down a gas to a temperature barely above absolute zero.
They won a Nobel Prize in Physics in 2001 for their work一not a discovery in this case.
Why is the two scientists'work so important to science?
In the 1920s，Satyendra Nath Bose was studying an interesting_______(60)about special light par-
tidles（微粒）we now call photons（光子）.Bose had trouble __________(61)other scientists to believe his
theory,so he contacted Albert Einstein. Einstein’s calculations helped him theorize that atoms_______(62)
behave as Bose thought一but only at very cold temperatures.
Scientists have also discovered that ultra-cold（超冷）atoms can help them make the world'S atomic
clocks even__________(63)accurate.These clocks are so accurate today they would oniy lose one second
_________ (64)six million years!Such accuracy will help us travel in space because digtanee is velocity
（速度）times time( d=vt).With the long distances involved in space _______(65),we need to know
time as accurately as possibie to get accurate distance. _________(55)
A.system
B.energy
C.year
D.rays

[单项选择]质监机构应当建立健全公路水运工程试验检测活动监督检查制度，对检测机构进行( )的监督检查，及时纠正、查处违反本规定的行为。A. 定期B. 不定期C. 定期或不定期D. 随机

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[单项选择]质监机构应当建立健全公路水运工程试验检测活动监督检查制度，对检测机构进行( )的监督检查，及时纠正、查处违反本规定的行为。
A. 定期
B. 不定期
C. 定期或不定期
D. 随机