However, at intervals of 10 to 100 years, these glaciers move forward up to 100 times faster than usual.

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问题 However, at intervals of 10 to 100 years, these glaciers move forward up to 100 times faster than usual.

选项 A、records
B、speeds
C、distances
D、periods

答案D

解析 然而,每隔10到100年,这些冰川的移动速度就会比平常快100倍。A项records “n. 记录”。B项speeds “n. 速度”。C项distances “n. 距离”。D项periods “n. 周期,时期”。
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