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【单选题】
客车斜探头空载始波宽度测试在CSK-1A试块R100圆弧面一次回波幅度最高，为垂直满幅50％，将增益或衰减器衰减量减少（），探头置于空气中擦去表面油层，读取从零点到始波后沿与垂直刻度20％交点所对应的水平距离W0为空载始波宽度。A.
12dB
B.
20dB
C.
30dB
D.
40dB
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举一反三
【单选题】( ) 5.She was very sleepy,____ she kept reading late into fhe night.
A.
yet
B.
for
C.
also
D.
still
【单选题】Although she was very ______, she couldn't fall ______ in a short time. [ ]
A.
sleepy; sleeping
B.
sleepy; asleep
C.
asleep; sleepy
D.
asleep; sleeping
【单选题】She was very sleepy, _____ she kept reading late into the night.
A.
yet
B.
and
C.
also
D.
still
【单选题】She stayed up very late the night before, so she was still tired and____when he woke her the next morning.
A.
excited
B.
sleepy
C.
glad
D.
happy
【单选题】—位老年女性病人,天前抬重物时腰背部扭伤,疼痛逐渐加重,X线平片发现第12胸椎,第1腰椎椎体变扁,但椎间隙保持正常,CT捡查发现椎体骨质不完整,周围有骨片与软组织密度影。此病例最需要鉴别的脊椎骨折原因是:
A.
单纯外伤和椎体先天畸形
B.
单纯外伤和椎体结核
C.
单纯外伤和椎体转移瘤
D.
椎体先天畸形和椎体结核
【单选题】She was very sleepy,_____ she kept reading later into the night.
A.
yet
B.
and
C.
also
D.
still
【单选题】一位老年女性患者，1天前抬重物时腰背部扭伤，疼痛逐渐加重，X线平片发现第12胸椎，第1腰椎椎体变扁，但椎间隙保持正常，CT检查发现椎体骨质不完整，周围有骨片与软组织密度影。此病例最需要鉴别的脊椎骨折原因是（）
A.
单纯外伤和椎体先天畸形
B.
单纯外伤和椎体结核
C.
单纯外伤和椎体转移瘤
D.
椎体先天畸形和椎体结核
E.
椎体结核和椎体转移瘤
相关题目：
【单选题】She was very sleepy, _____ she kept reading late into the night.
A.
yet
B.
and
C.
also
D.
still