Two of _________(big) earthquakes that were ever recorded tood place in China and Alaska.
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Every decision has constraints _______(base ) on policies, procedures ,laws, precedents ,and the like.
These mine planets ,together with the sun ,make up what _______(call) our solar system.
设某机主频为200 MHz,每个指令周期平均为2.5机器周期,每个机器周期平均包括2个时钟周期,则该机平均速度是________。
Should doctors be allowed_________(take) the lives of others?