2. 外语
  3. Their distribution is also, sometimes, widely spaced, in places, closely packed together. ______

Their distribution is also, sometimes, widely spaced, in places, closely packed together. ______

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问题 Their distribution is also, sometimes, widely spaced, in places, closely packed together. ______
选项 A、various
B、alternative
C、variable
D、conventional
答案C
解析 variable“易变的，多变的，反复无常的”；various意为“不同的，各种各样的”；alternative意为“供选择的，供替代的”；conventional意为“习惯的，惯例的”。
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