Since life is full of changes, the more general your goal is, the more good it will do to
查看答案
【C16】
A. who
B. they
C. that
D. which
A．terribleB．aspectC．respectD．mathematics
A. terrible
B. aspect
C. respect
D. mathematics
A．importantB．reliableC．sadD．acceptable
A. important
B. reliable
C. sad
D. acceptable
What do we learn about a stem cell？
A. It has no difference from other cells.
B. It can only become a certain type of cell.
C. It can't become a kidney cell.
D. It maintains and repairs the body.
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