According to the passage, the chief purpose of explorers in going to unknown places in the past was ______.
A. to display their country's military might
B. to accomplish some significant science
C. to find new areas for colonization
D. to pursue commercial and state interests
查看答案
Today's corporate executive officers resemble the industrialists and agriculturists in the past in their realization of ______.
A. the essential roles of the workers in turning out more products
B. the importance of information to a company's development
C. the importance of technology leading to high employee productivity
D. the necessity of providing employees with a comfortable environment
By saying "With Mars the scientific stakes are arguably higher than they have ever been" in the fourth paragraph, the author means that ______.
A. with Mars the risks involved are much greater than any previous space ventures
B. in the ease of Mars, the rewards of scientific exploration can be very high
C. in the case of Mars, much more research funds are needed than ever before
D. with Mars, scientists argue, the fundamental interests of science are at issue
What is the main goal of sending human missions to Mars
A. To find out if life ever existed there.
B. To see if humans could survive there.
C. To prove the feasibility of large-scale space ventures.
D. To show the leading role 6f science in space exploration.
The author's chief argument against high heels is that ______.
A. they pose a threat to lawns
B. they are injurious to women's health
C. they don't necessarily make women beautiful
D. they are ineffective as a weapon of defense
微信支付 
支付宝支付