下载APP
【单选题】
A hundred (41) years ago there were a lot of dinosaurs (恐龙) in the world. Some lived on land. Some lived in the sea. Some (42) fly. A lot of them (43) very large and some had horns (角) or long teeth (44) the monsters (怪物) in films. Most of the dinosaurs were plant-eaters, but some of them could kill (45) eat very big animals.
The world was full of dinosaurs for 135 million (百万，百万个) years. 60 million years ago, however (然而，不管怎样), they were (46) dead. (47) happened to them
Some scientists say that about 65 million years ago the world’s climate (气候) (48) cold (寒冷的，伤风) and this cold climate killed the dinosaurs.
Now we eau only see dinosaur bones (骨骼) in (49) , but we can not see a (50) dinosaur any more.
A.
were
B.
could
C.
would
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Almost Human Scientists are racing to build the world’s first thinking robot. This is not science fiction: some say they will have made it by the year 2020. Carol Packer reports. Machines that walk, ...
A.
explore space.
B.
entertain people.
C.
move much faster.
D.
do all of the housework.
【单选题】There are two methods of fighting, the one by law, the other by force the first method is that of men, the second of beasts but as the first method is often insufficient, one must have recourse to the...
A.
method
B.
resort
C.
follow
D.
change
【单选题】一般来说，当帝国的权力来自一个人时，它便软弱；而当它来自千百万人民时则强大……如果学者、商人和老百姓都能关心民族的危难，那么这样的人民将是聪明的，否则是愚昧的。这个观点在中国的最早倡导者应是
A.
鸦片战争中新思想的代表人物
B.
新文化运动中的激进知识分子
C.
辛亥革命时期资产阶级革命派
D.
甲午战争后的资产阶级维新派
【单选题】三江源头的青海境内河流众多，水量充沛，目前再建的大中型水电站有12座，其中装机容量达百万千瓦以上的有5座，下列不属于这5座的是（）
A.
龙羊峡
B.
李家峡
C.
拉西瓦
D.
寺沟峡
【单选题】For a long time, men want to see whether lifeless computers can exercise judgment, make choices, give birth to ideas, and play games intelligently. At the far limit of possibility, they wish to know w...
A.
science has proved that reproductive monster machines are already existing in the world
B.
science has proved that the authors mentioned above tend to go to extremes
C.
science has not completely denied the possibility of reproductive powers of machines
D.
science is trying to prove the existence of reproductive monsters in the world