2. 外语
  3. ______, we keep records on all the experiments so that we may have enough data.

______, we keep records on all the experiments so that we may have enough data.

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问题 ______, we keep records on all the experiments so that we may have enough data.
选项 A、As a whole
B、As a rule
C、On the average
D、By all means
答案B
解析 as a(general)rule：通常，一般来说。因此B最符合题意。例如：As a rule，he doesn’t go to the office on Saturdays.(星期六他通常不去办公室。)as a whole：作为一个整体，整体来看。例如：The temperature for the country as a whole is relatively high. (这个国家的气温总的来说是较高的。)On(an/the)average：按平均值，通常。例如：On(the/an)average I work ten hours a day. (我平均每天工作10小时。)by all means；尽一切办法，务必。例如：By all means，I must visit my sick friend.(我一定得去探望我那个生病的朋友。)
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