司钻法压井在第一循环周内，立管压力保持（）不变。
A.关井立压
B.关井套压
C.终了循环立管总压力
D.初始循环立管总压力
参考答案：D
—You're very _____, aren't you?
—Yes. Our team has won the game . [ ]
A. happy
B. worried
C. sad
D. afraid
