在Excel中我们直接处理的对象称为工作表，若干工作表的集合称为（）。
A.工作簿
B.文件
C.字段
D.活动工作簿
参考答案：A
男，25岁，例行体检时超声发现脾内占位。根据超声声像图诊断为（）。
A.血管瘤
B.淋巴管瘤
C.畸胎瘤
D.淋巴瘤
E.脾内钙化灶
When in his rebellious years, that is when he was sixteen or eighteen, Frank Anderson ______ going around with a strange set of people and staying our very late.
A．took to
B．took up
C．took on
D．took in
