重症肌无力最早受累的肌群是（）
A.眼外肌
B.咀嚼肌
C.四肢肌
D.咽喉肌
E.心肌
参考答案：A
Last summer when we were holidaying in Scotland,our children preferred________in the wild
________in a hotel. [ ]
A. to camp; to live
B. to camp; to living
C. camping; to living
D. camping; to live
（）为缓控释制剂的水不溶性骨架材料。
A．PLA
B．MC
C．硬脂酸
D．HPMC
E．聚氯乙烯
