The earth is unfrozen today with the appearance of ______.
A. the methane blanket
B. a mile-thick layer of ice
C. new life forms
D. the carbon dioxide
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The photosynthesis by ancient microbes is an example of ______.
A. the change of Earth
B. the long history of Earth
C. the life's influences on Earth
D. the power of sunlight
According to Edwards, the microbes are now ______.
A. recognized by most people
B. neglected by most people
C. died out from the Earth
D. out of action of the Earth system
A．Husband and wife.B．Personnel Manager and secretary.C．Sales Manager and Manager-gener
A. Husband and wife.
B. Personnel Manager and secretary.
C. Sales Manager and Manager-general.
D. They can be interesting only to small groups of people.
A．The candidate would be given a big salary to start with.B．The candidate's increases
A. The candidate would be given a big salary to start with.
B. The candidate's increases in salary would be dependent on his effectiveness.
C. The candidate would get a bonus though he has no overtime pay initially.
D. The candidate expects high salary though he would not have the ability.
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