油层回接固井最后一趟起钻前应在底部替入性能稳定的新井浆（）米。
A.1000
B.900
C.700
D.300
参考答案：A
He studied the project carefully, determined ______ it ahead of time.
A．finish
B．finishing
C．to finish
D．to have finished
试述疳证与积滞在临床表现上有何不同？两者之间又有何联系？
