什么是井巷维修?
参考答案:
由于矿山压力造成的井巷被破坏,对矿井通风、运输、行人、设备等造成严重不利影响,而必须对井巷进行的维护修理工作,被称为井巷维修。
能够作用于正常细胞使之产生抗病毒蛋白的免疫分子是()
A.抗体
B.补体
C.抗菌肽
D.穿孔素
E.干扰素
There is a difference between what we know, which is our linguistic competence, and how we use this knowledge in actual speech production and______, which is our linguistic performance. ( )
A.creation
B.communication
C.comprehension
D.perception