During most of their lives, surge glaciers behave like normal glaciers, traveling perhaps only a couple of inches per day. However, at intervals of 10 to 100 years, these glaciers move forward up to 100 times faster than usual. The word "intervals" is closest in meaning to which of following?
(A) records
(B) speeds
(C) distances
(D) periods

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統計： A(48), B(21), C(40), D(290), E(0) #440678

詳解 (共 2 筆)

#2720730
at intervals of 10 t...
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#1557503

at intervals of 10 to 100 years, 

10-100 years為時間單位，則應選periods (週期)，可能誤選成(B) speeds 速度，應注意速度為距離/時間，因此不能選(B)

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