题目内容

Which device serves as a common connection point for devices in a wireless network?

A. wireless access point
B. wired router
C. wireless adapter

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Bluetooth is a wireless technology that uses radio waves to transmit data over

A. long distances
B. medium-range distances
C. short distances (ten meters or less)

按自然数从小到大为标准次序，则51243的逆序数是（）。

对调行列式的两行，行列式的值不变。

A. 对
B. 错

若行列式两行的元素成比例，则此行列式的值为0。

A. 对
B. 错