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单项选择题
Which statement is not true about flagella
A．Flagella are part of bacteria.
B．Flagella help bacteria to move.
C．Flagella are always going round and round.
D．Flagella are like waves.
单项选择题
What is the value of work for Mr. Smith
A．Making contribution.
B．Gaining self-esteem.
C．Making a living.
D．Realizing ideal.
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