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【简答题】
一个平行板电容器,两极板间是空气,极板的面积为 50 cm 2 ,两极板间距是 1mm 。试求1电容器的电容;2如果两极板间电压是 300V ,电容器所带的电荷为多少?
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【多选题】Which type of synovial joint is the sternoclavicular joint?
A.
saddle joint
B.
pivot joint
C.
hinge joint
D.
ellipsoidal joint
E.
plane joint
【单选题】The sternoclavicular joint
A.
has two separate joint cavities
B.
lies at the level of the second costal cartilage
C.
is strengthened by the conoid ligament
D.
is a fibrous joint
E.
has none of the above properties
【单选题】Which type of synovial joint is the sternoclavicular joint?
A.
saddle joint
B.
pivot joint
C.
hinge joint
D.
ellipsoidal joint
E.
plane joint
【单选题】Sternoclavicular joint
A.
is the only joint between the upper limb and the trunk
B.
is formed by the sternal end of the clavicle and the clavicular notch of sternum
C.
its capsule is thin and loose
D.
has no the articular disc
E.
it can elevate and depress only
【单选题】Sternoclavicular joint
A.
is the only joint between the upper limb and the trunk
B.
is formed by the sternal end of the clavicle and the clavicular notch of the sternum
C.
its capsule is thin and loose
D.
has not the articular disc
E.
it can elevate and depress only
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