【单选题】运行在微机上的 Windows7是一个( )磁盘操作系统。
【单选题】What is a reason why Sphynx cats are different from other cats? A B C D
A.
They are harder to love than most cats.
B.
They are warmer to the touch than most cats.
C.
They are easier to clean than most cats.
D.
The are cheaper to buy than most cats.
【多选题】关于热缺陷的说法正确的是
A.
晶体中粒子的热运动能量也和气体中一样,也有一定的统计分布。
B.
在一定温度下,总有一些粒子具有足够的能量脱离平衡位置而形成缺陷。
C.
扩散的机制是由于热缺陷的存在及其在晶体中能够运动,就可以使晶体中的粒子由一个地方移到另一个地方。
D.
有电场时离子晶体之所以能够导电,也是由于热缺陷的存在和运动,使离子晶 体中的离子能够在电场作用下移动的缘故。
【简答题】阅读理解。 Cats and dogs are both popular pets. Cat owners think that cats are nicer pets in some ways. Cats are cleaner, first of all. They keep themselves clean, and they do not make the house dirty. Cat...
【简答题】补全对话,每空一词。 A:Betty, what kind of pet would you like to 1 ? B: 2 do you think of cats? They are lovely and quiet. A:They are boring, and they are too lazy. How 3 dogs? They are. 4 to people. B:Well, do...
【单选题】关于物体内能的下列说法,正确的是 ( )
【单选题】In what way are basenjis like cats?
A.
They make gentle sounds instead of barking.
B.
They are fond of people and look like cats.
C.
They clean themselves all over.
D.
They have short, silky fur.
【单选题】关于中和热测定实验的下列说法不正确的是
A.
烧杯间填满碎泡沫塑料是减少实验过程中的热量损失