目前集团的产业布局包括哪些？
参考答案：
商业、地产、酒店和投资。
Jane was disappointed that most of the guests_______when she _____at the party.
A．left; had arrived
B．left; arrived
C．had left; had arrived
D．had left; arrived
不属于快速进展型牙周炎的主要致病菌为
A．侵蚀艾肯菌B．伴放线放线杆菌C．聚核梭杆菌D．牙龈类杆菌E．中间型类杆菌
