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【单选题】
若 ,则a,b,c的大小关系是
A.
B.
C.
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举一反三
【单选题】Task 1 Choose the best answer to each question according to the passage we have learned. 1. According to the sample invitation card, why are they going to hold an office party?
A.
to celebrate New Year’s Day
B.
to celebrate Christmas
C.
to celebrate Mother’s Day
D.
to celebrate Thanksgiving Day
【单选题】机器设备的经济寿命是指机器设备( )。
A.
从评估基准日起到机器设备不能正常工作所经历的时间
B.
从机器设备开始使用起到机器设备不能正常工作为止所经历的时间
C.
从评估基准日起到继续使用在经济上不合算为止所经历的时间
D.
从开始使用到继续使用在经济上不合算为止所经历的时间
【单选题】机器设备的经济寿命是指机器设备()
A.
从全新状态开始使用,直到不能正常工作而予以报废所经历的时间
B.
从开始使用到技术过时予以淘汰所经历的时间
C.
从开始使用到经济上不合算而停止使用所经历的时间
D.
从评估基准日到经济上不合算而停止使用所经历的时间
【简答题】“Heard melodies are sweet, but those unheard / Are sweeter; therefore, ye soft pipes, play on”. These two lines are the poet’s description and appreciation of a ____ ____.
【判断题】The start end and the end end of a center line and a phantom line should be long dashes. And when these two types of lines are very short, they could be replaced by thin solid lines.
A.
正确
B.
错误
【多选题】Once upon a midnight dreary, while I pondered, weak and weary, Over many a quaint and curious volume of forgotten lore— These two lines _____.
A.
are from "The Raven"
B.
build melancholy and gloomy atmosphere
C.
use alliteration and internal rhyme
D.
show the narrator "I" is reading some new and modern books
【简答题】患者,男,78岁。胃癌晚期,不能进食,给予脂肪乳、氨基酸等输入。为患者输液的主要目的是
【单选题】机器设备的经济寿命是指( )
A.
机器设备从使用到报废为止的时间
B.
机器设备从使用到运营成本过高而被淘汰的时间
C.
从评估基准日到设备继续使用在经济上不合算的时间
D.
机器设备从使用到出现了新的技术性能更好的设备而被淘汰的时间
【单选题】Two equal magnitude forces are in opposite directions and their lines of action are separated by distance d. These two forces are applied to a solid disk, which is mounted on a frictionless axle. If d...
A.
One force on a line touching the circumference of the disk, the other on a line halfway to the center.
B.
One force on a line at a distance d from the center and the other on a line through the center of the disk.
C.
One force on a line at a distance d/2 from the center of the disk, and the other on a line at a distance d/2 on the opposite side of the center of the disk.
D.
Since all the other orientations give the same torque, choose this answer.
【判断题】催化裂化生产的汽油和柴油中含有较多的烷烃。
A.
正确
B.
错误
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