重症肺炎易发生微循环障碍的病菌是()
A.革兰阳性球菌
B.革兰阴性杆菌
C.病毒
D.衣原体
E.支原体
参考答案:B
全陪导游人员的职责是什么?
At present, the most important thing is that Britain needs()more to improve the relationship with the USA
A.to do
B.doing
C.to be done
D.do