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单选题
CREST（）
A
抗PM-1
B
抗SSA
C
抗SM
D
抗核仁RNA
E
抗着丝点
参考答案
参考解析
解析：
5.SLE常见的抗体包括抗双链DNA、抗单链DNA、抗组蛋白等，其中抗SM为SLE的标记抗体。抗着丝点抗体是CREST的标记抗体。皮肌炎则可见抗PM-1、抗Mi-1、抗PL-7、抗JO-1抗体阳性。
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考题
Air gap is the vertical distance between the bottom of the hull and the ______．A.Still water levelB.Wave crestC.Wave crest plus the charted water depth and tidal correctionsD.Wave crest plus the charted water depth and tidal correction and storm surge
考题
单选题Air gap is the vertical distance between the bottom of the hull and the（）.A
still water levelB
wave crestC
wave crest plus the charted water depth and tidal correctionsD
wave crest plus the charted water depth and tidal correction and storm surge
考题
单选题The length of a wave is the length（）.A
of the wave's crestB
of the wave's troughC
measured from crest to troughD
measured from crest to crest
考题
单选题The condition where a ship on the end of a tow line is riding a wave crest at the same time as its tug rides a wave crest is known as riding in（）.A
synchronismB
harmonyC
checkD
step
考题
单选题When towing in an open seaway，it is important to use a towing line（）.A
made only of wire rope，due to possible weather conditionsB
that will have the tow on a crest while your vessel is in a troughC
that will have the tow on a crest while your vessel is on a crestD
with little dip to gain maximum control of the tow
考题
问答题CREST综合征是指什么？
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