每题的备选项中,只有1个最符合题意。 (一) 矿山安全技术 下列关于石油地震勘探安全要求,表述错误的有( )。
A. 营地应选择在地势平坦、干燥、道路畅通、取水便利、水源无污染和背风的地方,并应避开易燃、易爆或有毒、有害物品的工厂或场所及易受自然灾害侵袭的地方
B. 在荒漠、沼泽等无人烟地区施工时,施工人员应至少2人以上同行,并确保通讯联络畅通
C. 沙漠地区测量时,应在已确定的营地中心至测线工区道路两旁设置明显、牢靠的路标,路标间隔一般为300~500m
D. 进行勘探作业时,在接近危险区的边界处应设警戒岗哨和安全标志,禁止人、畜、车(船)进入危险区域内
Tom had once worked in a city office in London, but now he is out of work. He had a large family to support, so he often found himself in difficulty. He often visited Mr. White on Sundays, told him about his troubles, and asked for two or three pounds.Mr.White, a man with a kind heart, found it difficult to refuse the money, though he himself was poor. Tom had already received more than thirty pounds from Mr. White, but he always seemed to be in need of some more.One day, after telling Mr. White a long story of his troubles, Tom asked [or five pounds.Mr. White had heard this sort of thing before, but he listened patiently to the end. Then he said, "I understand your difficulties, Tom. I’ d like to help you. But I’m not going to give you five pounds this time. I’ll lend you the money, and you can pay me off next time you see me. "Tom took the money, but he never appeared again. Every time Tom went to Mr. White, he would()
A. directly ask for some money
B. give some reasons before asking for money
C. give reasons and then borrow five pounds
D. ask for money before explaining his troubles