眼眶密度减低可见于()
A．眶内组织水肿
B．眶内组织出血
C．眼球肿瘤
D．眼球增大
E．小眼球与无眼球畸形
参考答案：E
在配合制度上轴承与轴的配合采用基孔制。
A joint probability of A and B must always be:（）
A. less than or equal to the conditional probability of A given B.
B. greater than or equal to the conditional probability of A given B.
C. greater than or equal to than the probability of A or B.
