The remarkable______of life on the Galopagos Islands inspired Charles Darwin to establish
A. diversion
B. density
C. diversity
D. duplication
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Callum: I______sometimes, just like most kids. But then I usually got down to work in the
A. got through
B. pulled up
C. messed around
D. stepped aside
—Learning a language isn’t easy. It takes time. —I agree. ______. There’s no short cut.
All roads lead to Rome
B. Rome wasn’t built in a day
C. Time and tide wait for no man
D. Slow but sure wins the race
圆柱体的侧面积扩大到原来的8倍，高扩大到原来的2倍，则底面半径扩大到原来的倍数是()．
A. 2
B. 4
C. 8
D. 2/π
E. 8/π
立方体的边长扩大为原来的2倍后的体积比原来的体积大()倍．
A. 5
B. 6
C. 7
D. 8
E. 9
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