The article gives us a summary of the situation in the first part and then discusses it ______.
A.
at issue
B.
at length
C.
at random
D.
at large
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
举一反三
【简答题】Hydroxycinnamic acids are commonly found in the form of esters, along with a cyclic alcohol–acid ester such as the quinic acid. The most abundant and studied hydroxi-cinnamic acid is chlorogenic acid ...