下列哪一种离子与胃黏液共同构成胃黏膜屏障,以保护胃黏膜
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Cl<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230213/7670174_0_1.gif"> C
HCO<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230213/7670174_0_2.gif"> D
Ca<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230213/7670174_0_3.gif"> E
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