The whole passage is intended to ______.
A. help readers have a better understanding of nanotech
B. show that industries are all set for the nanotech age
C. tell readers the hurdles ahead the research of nanotech
D. reveal the potential benefits and big business of nanotech
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What must the explorers be, even though they have modern equipment and techniques？
A. Brave and tough.
B. Stubborn and arrogant.
C. Well-liked and humorous.
D. Stout and smart.
Which of the following is NOT the difficulty we face about nanotech research？
A. How to prolong the 10 to 20 years' time.
B. How to eliminate the public's prejudice.
C. How to solve the problem of big and small.
D. How to get enough manpower and money.
Scientists argue that the genetic testing is not perfect partly because ______.
A. it chiefly centers on predictive gene testing
B. the health care for patients is not professional
C. it may arouse the patients' discomfort mentally
D. it involves the DNA test and biochemistry
Alan's grandpa caught cold last week.
A. 真
B. False
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