问题
选择题
| Human facial expressions differ from those of animals in the degree _______ they can be controlled on purpose. |
A. with which B. to which C. of which D. for which |
答案
答案：B
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| Human facial expressions differ from those of animals in the degree _______ they can be controlled on purpose. |
A. with which B. to which C. of which D. for which |
答案：B