消防潜水员必须经过(),拿到潜水资格证后才能潜水作业。
A.考试
B.专业游泳培训
C.游泳训练
D.专业潜水培训
参考答案:D
单词填写,用括号内所给单词的正确形式填空,用0.5毫米的黑色签字笔依次填写在答题卡规定的位置上。
小题1:Keep quiet! You are speaking too ____________. (noise)
小题2:Please cut the apple into _______. (half)
小题3:There are a lot of foreign ____________ (travel) on the train.
小题4:Bananas ___________ (grow) in the south of China.
小题5:He had visited many countries in his ______________. (thirty)
小题6:________________ (luck), he missed the last bus.
小题7:I’d like to buy a _________________(wool) sweater.
小题8:This year my father is _____________ (health)than last year.
小题9:He feels like____________(do) morning exercises every day.
小题10:The village is far from the big city. It looks very ____________(peace).
钢液钙处理的作用是()。
A.脱氧
B.脱硫
C.夹杂物变性
D.脱氧、脱硫、夹杂物变性