I cannot make head or tail of these instructions _____ the packet. Can you explain them to me?

lf a park visitor is hurt or in danger, cell phones make it easier to get help.

Which WLAN device is often used to make wireless connections between buildings or campuses?（）

Which WLAN device is often used to make wireless connections between buildings or campuses?（）

During loading or discharging, the tallymen must make contact with（）on duty so as to solve problems in time.

During loading or discharging，the tallymen must make contact with（）on duty so as to solve problems in time.

可以在（）阶段采用Make-or-buy决策分析。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

Why would you make a non-backbone area a stub or not-so-stubby area?（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。