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【多选题】
光学式位置跟踪设备的优点是（）。
A.
速度快
B.
场地无要求
C.
较高的更新率
D.
较低的延迟
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】New Technique Promises Earlier Cancer Detection A new technique could revolutionize the early detection of cancer, giving sufferers a greater chance of beating the disease, American scientists said. R...
A.
before
B.
after
C.
although
D.
near