The text tells us that the universe______.
A. was formed by a random observer
B. has been in existence for an infinite amount of time
C. has undergone change over time
D. is constantly expanding
某些儿童出现吃土、煤渣等异嗜癖是营养性缺铁的症状。()
What do we learn from the text？
A. Information technology is important for the transportation industry.
B. The transportation industry has completed the task of using information technology to improve critical systems.
C. Many people fail to realize the importance of the transportation industry.
D. Many people fail to realize the importance of information technology.
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