皮皮学，免费搜题
登录
搜题
【单选题】
计算机软件可以分为商品软件、共享软件和自由软件等类型。在下列相关叙述中，错误的是（）。A.
通常用户需要付费才能得到商品软件的使用权，但这类软件的升级总是免费的
B.
共享软件通常是一种"买前免费试用"的具有版权的软件
C.
自由软件的原则是用户可共享，并允许拷贝和自由传播
D.
软件许可证是一种法律合同，它确定了用户对软件的使用权限
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】Section B (8 points) Directions: This section is to test your ability to understand short dialogues. There are 2 dialogues in it. After each dialogue, there is a recorded question. The dialogues and ...
【简答题】钢进行扩散退火的目的是为了减少钢锭、铸件或锻坯的____的不均匀性 ,进行再结晶退火的目的是为了消除____作用,便于继续冷加工 。
【单选题】4) Fun Outdoor Activities Club members are all
A.
experienced people.
B.
outdoor activity lovers.
C.
just the beginners.
D.
activity organizers.
【单选题】Sally touched the wall at the end of the swimming pool and heard the cheers.
A.
莎莉的手碰到了游泳池一端的池壁,此时耳边传来人们的欢呼声。
B.
莎莉的手碰到了游泳池底端的池壁,此时耳边传来人们的欢呼声。
C.
莎莉的手推倒了游泳池一端的池壁,此时耳边传来人们的欢呼声。
D.
莎莉的手碰到了游泳池一端的池壁,此时耳边传来人们的鼓掌声。
【单选题】Which one is not the advantage of the outdoor activities?
A.
Outdoor activities are good for our health.
B.
They can relax both our mind and our body.
C.
People easily make friends when they often join outdoor activities.
D.
People may be injured when they often join outdoor activities.
【单选题】Other fathers are watching their sons cope with the demons of today.
A.
diseases
B.
difficulties
C.
poverty
D.
evils
【单选题】He would like to do outdoor activities中do outdoor activities是什么意思?
A.
做室内活动
B.
做户外活动
C.
做活动
D.
/
相关题目：