骨骼肌纤维收缩时,其肌节的变化是 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
.仅 I 带缩短 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
B.
.仅 A 带缩短 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
C.
. I 带、 A 带均缩短 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
D.
.仅 H 带缩短 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
E.
. I 带、 H 带均缩短 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>