【判断题】多平面重建已经有非常成熟的算法,已经在CT和MR中获得较好的应用()。
【单选题】Why did Elizabeth I choose to be single for her life? _______.
A.
Because her religious belief went against her marriage.
B.
Because the foreign power came in the way of her marriage.
C.
Because her Mr. Right passed early.
D.
Because she used her marriage prospects as a political tool in foreign and domestic policies.
【判断题】血铅水平与IQ之间存在着负相关,血铅浓度在200ug/L时就能对发育造成危害。
【多选题】关于一定质量的理想气体,下列说法正确的是( )
B.
气体压强的大小等于大量气体分子作用在器壁单位面积上的平均作用力
C.
气体分子在做永不停息的无规则热运动,分子运动的速率分布毫无规律
D.
等温压缩过程中,气体压强增大是因为气体分子每次碰撞器壁的冲力增大
【单选题】Why did Elizabeth I choose to be single for her life?______.
A.
Because her religious belief went against her marriage.
B.
Because the foreign power came in the way of her marriage.
C.
Because her Mr.Right passed early.
D.
Because she used her marriage propects as a political tool in foreign and domestic policies.
【单选题】男性,60岁,因胸痛就诊,既往有心绞痛十年。鉴别急性心肌梗死与心绞痛,症状的主要区别是