皮皮学，免费搜题
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【单选题】
药品批准文号中化学药品使用的字母是A.
T
B.
S
C.
Z
D.
H
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
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A.
U代表光合色素，在光合作用里可以吸收光能
B.
CO 2 到Y的过程中所需的ATP来自细胞呼吸
C.
W来源于水的光解过程
D.
Y中的能量最终来源于叶绿体类囊体薄膜上光能的转换
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A.
咽期
B.
准备期
C.
食管期
D.
环咽肌开放期
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