螺杆钻具钻井时,泵压逐渐下降的原因不是()。
A.钻头刺漏
B.发生井漏
C.地层岩性改变
D.钻头水眼堵塞
参考答案:D
"You'll have to wait for an hour, ________is, about 10:20, ________the examination result will
come out," the teacher said to me.[ ]
A. that; when
B. which; that
C. that; before
D. which; when
违反税收法律、行政法规应当给予行政处罚的行为,在()年内未被发现的,不再给予行政处罚。
A.2
B.3
C.5
D.10