当设备安装基础较高时，应采用的单桅杆吊装方法为（）。
A．斜立单桅杆偏心吊法
B．斜立单桅杆滑移吊法
C．单桅杆旋转吊法
D．单桅杆扳倒吊法
参考答案：A
It's good for you to keep ________ when you have difficulty _________. [ ]
A. trying; to do it
B. doing; to do it
C. to try; to do
D. trying; doing it
转借、转让、发票的税务机关应怎样处理？
