放射性核素显像根据显示方法不同分为:①_____、②_____、⑧_____、④_____。
参考答案:静态和动态显像,局部和全身显像,平面与断层显像,阳性和阴性显像
Several months later, he found Mr. Jackson very difficult ________.
A.to get along with
B.getting along with
C.to get along
D.to be gotten along with
河道整治工程一般包括险工和控导工程,其整治建筑物主要包括()、垛和护岸。