找窜施工,要根据()确定压井液的密度,以压而不喷、安全施工,与地层配伍性好,不污染油层为原则。
A、套压
B、油压
C、流压
D、地层压力系数
参考答案:D
阅读理解,选择正确的答案。
I am a girl. My name is Jenny. I am fifteen. I am a student. I like to play ping-pong. In the morning, I go to
school. In the afternoon, I finish school at three o'clock. I walk home. After supper, I do my homework.
1. How old is Jenny?[ ]
A. She is fifteen.
B. She is five.
C. She is fourteen.
2. Does Jenny like to play ping-pong?[ ]
A. Yes, she is.
B. Yes, she does.
C. No, she doesn't.
3. , Jenny goes to school.[ ]
A. In the evening
B. In the afternoon
C. In the morning
行走时膝关节受力约为体重的()
A.0.5倍
B.1倍
C.2倍
D.3倍
E.4倍