在分子量相近时，烷烃的焓值低于芳香烃的焓值。
参考答案：错
解析：在分子量相近时，烷烃的焓值高于芳香烃的焓值。
---Is that Jack speaking?
---Sorry, he isn’t in right now. He ______ the cinema with his aunt.
A．has been to
B．has gone to
C．have been to
D．have gone to
糖皮质激素不具有哪种作用
A．促进糖异生B．抗炎作用C．抗毒作用D．抗病毒作用E．缩短凝血作用
