鉴别脑血栓形成和脑出血最简便而有意义的检查是__________。
参考答案：头颅CT
Windows中，选定当前文件夹中的全部文件和文件夹对象的快捷键是（）。
A.Ctrl+空格键
B.Ctrl+C
C.Ctrl+Alt+Del
D.Ctrl+X
E.Ctrl+A
They had a pleasant chat _______ a cup of coffee. [ ]
A. for
B. with
C. during
D. over
