Which of the followings is NOT MENTIONE in the passage?
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A save it on your hard disk B send and receive faxes C set up hardware for the fax modem D at a time E click the Close button on the toolbar F in addition to faxes intended for you
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A the communication problem B the ocean depths C the movement of waves D the problem of vacuum
3 .By “more challenging (Para. 6)”, the author means ___.
A more interesting B more demanding C more attractive D more dangerous
4 .Ocean exploration is not so expensive as space travel mainly because ______.
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5 .The sonar devices must be placed ________.
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7 .Which of the followings is NOT correct?
A Tap water reflects the concentrations of hydrogen and oxygen isotopes in different regions. B Tap water is a kind of soft drink in the United States. C Tap water contains unique proportions of isotopes of hydrogen and oxygen. D Tap water is used t cook food.
8 .James R. Ehleringer tried to find out ______.
A if our bodies break water down into its parts B if it is possible to collect hair samples across the country C if tap water contains unique proportions of isotopes of hydrogen and oxygen D if the composition of hair can indicate exactly where people are from
9 .Which of the following statements is meant by the writer?
A Ehleringer was successful in his research. B Ehleringer failed in his research. C Ehleringer can be a successful detective. D Ehleringer’s research proved successful in China.
10 .What does the last paragraph tell you?
A The new technique can tell precisely where a person lives. B Water supplied in different regions all comes from the same source. C Types of water used in different regions provide useful information for the police. D Hair samples provide the most important clues to identify crimes.
