隔离开关可以开合延长公里不超过（）kv的线路的空载电流。
参考答案：10
— I haven't got the reference book yet, but I'll have a test on the subject next month.
— Don't worry. You ________ have it by Friday. [ ]
A. could
B. shall
C. must
D. may
下列哪种病因引起的眼眶炎症属于炎性假瘤（）
A.无明确病因
B.结核
C.细菌
D.寄生虫
E.眼眶异物
