弹簧储能操动机构具备（）储能两种方式。
A、电动和手动
B、自动和手动
C、电动和自动
D、主动和被动
参考答案：A
Two lawyers have donated $50,000 to ________ our school's campaign "Help the Needy", which
was started by our former headmaster three years ago. [ ]
A. sponsor
B. launch
C. organize
D. plan
全站仪测图通过测量碎部点的（）和距离来确定碎部点的位置。
A、高差
B、方位角
C、方向角
D、象限角
