关于物体的内能，下列说法正确的是（ ） A．一杯水的温度越高，它具有的内能越大
题型：选择题
问题：
关于物体的内能，下列说法正确的是（ ）
A．一杯水的温度越高，它具有的内能越大
B．水具有内能，冰块没有内能
C．一杯水放在高处比放在低处时的内能大
D．只有通过加热的方法才能使水的温度升高
题型：选择题
阅读理解。
Ameri
can boys and girls love to watch television. Some children spend six hours a day in school and
four to six hours a day in front of the television. Some even watch television for eight hours or more on
Saturday.
Televisions are like books or films. A child can learn bad things and good things from them. Some
programmes (节目) help children to understand (理解) the news, others show people and places from
other countries or other time in history. With television a child does not have to go to the zoo to see
animals or to the ocean to see a ship. Boys and girls can see a play, a concert or a game at home.
Television brings many places and events (赛事) into our homes. Some programmes show crime
(犯罪) and other bad things for children, so parents sometimes help them to find other interesting things
to d
o.
1. Some children spend eight hours or more ________.
A. studying
B. playing games
C. watching TV
D. helping their parents.
2. On television children can see ________.
A. games
B. big animals
C. oceans
D. almost (几乎) everything
3. "Television brings places and events into homes" means ________.
A. television makes things happen in homes
B. we can know places and events without (没有) going to see them.
C. we can see houses and buildings on TV.
D. we can find them easily
4. Parents sometimes help their children find other things to do when there is ________ for children .
A. a bad programme
B. an animal
C. a game
D. an uninteresting film
近中切角缺损，未见穿髓孔，探（-），松（-），唇侧牙龈见瘘道口，挤压时未见明显脓液流出，X线片