According to a military system, people classify the environmental threats into three c
A、natural
B、local
C、regional
D、strategic
A、natural
B、local
C、regional
D、strategic
What's the key to a successful student according to the passage? ______.
A.Circumstances
B.Methods
C.Teachers
D.Motivation
According to the author, language changes are most likely to occur in .
A.grammar
B.pronunciation
C.vocabulary
D.intonation
According to the passage, a large population will provide a chance for developing ______.
A.agriculture
B.transport system
C.industry
D.national economy
According to the story, the game of chess was invented by ______.
A. an American Indian
B. an ancient Indian official
C. an Indian king
D. an Indian officer
According to the passage, the earth in its very early period was ______.
A. in molten state
B. in water state
C. in rock state
D. a vast ocean
According to the text, the Victorians invented _____.
[A] surgery [B] seaside holiday [C] funfair [D] mass entertainment