皮皮学，免费搜题
登录
搜题
【单选题】
()是判断某段程序为计算机病毒的首要条件。A.
隐蔽性
B.
传染性
C.
破坏性
D.
非法性
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】光的微粒性由 实验证实,电子波动性由 实验证实。
【简答题】常见的触电类型有哪些?
【简答题】What benefits does travel bring to the local people?
【多选题】What benefits does the visitor information center have?
A.
Those who comes to the visitors information center provide the CVB with an additional opportunity to impress them with great customer service.
B.
Visitors also provide the CVB the chance to sell them on additional attractions.
C.
Visitors experiences they may not have considered or even known about.