单项选择题 水准尺向前或向后方向倾斜对水准测量读数造成的误差是（  ）。 A. 偶然误差 B. 系统误差 C. 可能是偶然误差也可能是系统误差 D. 既不是偶然误差也不是系统误差

判断题 会议策划与活动管理一脉相承。

单项选择题 Block format and point-by-point format are two commonly used patterns of organization that can be used to write a compare/contrast essay. Please select from the following choices the one whose format conflicts with its examples. A、Block format: Paragraph1-apples    Color    Flavor    Variety Paragraph2-oranges    Color    Flavor    Variety B、Point-by-point format:    Paragraph1-color of apples and oranges    Paragraph2-flavor of apples and oranges    Paragraph3-variety of apples and oranges C、Block format:   Paragraph1 - color and flavor of apples and oranges   Paragraph2 - variety of apples and oranges D、---

判断题 CR400AF动车组中，将撒砂拨键开关拨至“前”位置（运行的方向）开始本车前轮对的撒砂；拨至“后”位置，开始整车撒砂。（ ）

单项选择题 停车周转率是指单位停车车位在某一间隔时段（一日、一小时或几小时）内停放车辆次数。 A、正确 B、错误