放射性核素显像与其他影像学比较()。
A.易发生过敏反应
B.受引入放射性活度限制
C.显示组织细微结构
D.图像分辨率不高
E.显像技术更为复杂
参考答案:B, D, E
苫盖易于损坏篷布的货物时,承运人必须采取防护措施。
—Why do you suggest we buy a new machine?
—Because the old one has been damaged ______.
A.beyond reach
B.beyond repair
C.beyond imagination
D.beyond description