在H2S防护演习中()检查H2S传感和检测设备、发现故障及时整改。
A、钻井监督
B、健康、安全与环境监督
C、平台经理
D、司钻
参考答案:B
--Have you tried to stop him __________eating too much junk food?
--Yes. But he still keeps ___________ eating a lot of fried chicken wings.
A.from, from
B.from , /
C./, from
D.for, from
公元前4世纪,数学家梅内赫莫斯在研究()问题时发现了圆锥曲线.
A.不可公度数
B.化圆为方
C.倍立方体
D.三等分角