为完成上述请求，采用最短寻道时间优先磁盘调度算法（SSTF）时磁头移动的总量是（）。……

单项选择题Which of the following about Waelbers is TRUE？（）

A.He didn't love building robots when he was a young boy.
B.His father asked him to make a robot that could play balls.
C.He is starting to sell this snow-shoveling robot in early 2017.

单项选择题The robot would stop in front of pets and people thanks to（）.

A.the remote controller
B.the ultrasound sensor
C.the big and square yard

单项选择题According to Steven Waelbers，the robot is designed to（）.

A.encourage people to do exercise
B.help people keep healthy and fit
C.make people enjoy family time

单项选择题This article mainly talks about（）.

A.a newly-designed robot
B.The founder of a company
C.problems with a new product

单项选择题患者烦躁不安，为防止患者受伤应采取的保护措施是（）。

A.使用绷带
B.使用肩部约束带
C.使用双侧床挡防止坠床
D.使用双膝固定防止坠床
E.使用腹部约束带