具有发达的血液循环和神经系统、肠道很短,雄性动物有一块阴茎骨的动物是()
A、兔
B、狗
C、猫
参考答案:B
Written in a hurry, __________________ .
A.they found many mistakes in the report
B.he made lots of mistakes in the report
C.there are a lot of mistakes in the report
D.the report is full of mistakes
关于CT值的描述,哪项是错误的()
A.CT值说明组织结构的密度高低
B.CT值没有单位
C.CT值具有量的概念
D.CT值由吸收系数换算而来
E.对比平扫和增强扫描的CT值,可了解强化程度