Bursae are fluid-filled sacs that (form) cushions (between) tendons and bones (a

游客2025-02-09 13

问题 Bursae are fluid-filled sacs that (form) cushions (between) tendons and bones (and) protect them (while) movement.

选项 A、form
B、between
C、and
D、while

答案 D

解析

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