多发性硬化的治疗主要为（）
A.抗生素
B.加强营养
C.免疫抑制剂
D.卧床休息
E.以上均不正确
参考答案：C
17．Most hotels in Sanya were full during the Spring Festival, but finally we______find a room in a small guesthouse near the seaside.
A．ought to
B．could
C．might
D．were able to
设计开工的标志是( )。
A．合同签字盖章
B．合同规定开工期限
C．签字后第三天
D．收到定金
