下列关于计算机病毒的叙述中，不正确的是( )。

A．计算机病毒不但能破坏软件，也能破坏硬件

B．计算病毒具有潜伏性，一旦条件具备才发作起来

C．计算机病毒具有传染性，只要与病毒程序相接触，就会受到传染

D．它是由于程序设计者的疏忽而产生的一种可大量复制的程序

What is TRUE about hoisting operations（）.

A.Personnel may work beneath suspended loads，as long as they are alert and wear hard hats

B.If a suspended load with no tag begins to spin，personnel should attempt to stop the spinning if the load is within reach

C.If tag lines are used to control a suspended load，they should be secured to the deck

D.Personnel not involved in the hoisting operation should be kept clear of the transfer area