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【单选题】
关于根分叉病变的叙述，下列何者恰当A.
Ⅳ度：根间骨隔完全破坏，牙龈退缩使根分叉区完全开放
B.
Ⅱ度：根分叉区骨吸收仅限于颊侧或舌侧，尚未相通：X线片见牙周膜增宽
C.
Ⅰ度：牙周袋已达多根牙根分叉区，但分叉内无牙槽骨破坏，X线片上看不到骨质吸收
D.
Ⅲ度：根间牙槽骨全部吸收，探针可通过根分叉区，X线片见该区骨质消失是透射区
E.
以上都对
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【单选题】It is clear that the dog has a much greater _____ of its brain devoted to smell than is the case with humans.
A.
proportion
B.
percent
C.
composition
D.
compound
【简答题】[eə] A. wear B. glare C. helmet D. edge E. helium
【单选题】It is clear that the dog has a much greater _____ of its brain devoted to smell than is the case with humans.
A.
composition
B.
compound
C.
percent
D.
proportion
【单选题】____allow the engines to be placed wherever is most suitable , as they no longer have to be aligned with reduction gearing and shafting as is the case with conventional installations
A.
diesel engine propulsion
B.
diesel electric propulsion
C.
steam engine propulsion
D.
gas turbine propulsion
【单选题】It is clear that the dog has a much greater _______ of its brain devoted to smell than is the case with humans.
A.
composition C) compound
B.
proportion D) percent
【单选题】（） allows the engine to be placed wherever is most suitable, as they no longer have to be aligned with reduction gearing and shafting as is the case with conventional installations.
A.
Diesel engine propulsion
B.
Diesel electric propulsion
C.
Steam engine propulsion
D.
Gas turbine propulsion
【单选题】It is clear that the dog has a much greater _______ of its brain devoted to smell than is the case with humans.
A.
composition
B.
proportion
C.
compound
D.
percent
【简答题】2019年1月29日,蓝牙技术联盟(SIG)宣布蓝牙5.1正式公布,新版本的蓝牙传输速度上限为 Mbps,是之前4.2LE版本的两倍。
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