钻机绞车的机械刹车在下钻和下套管时,()以控制下放速度。 A.刹慢滚筒 B.刹住滚筒

题型:单项选择题

问题:

钻机绞车的机械刹车在下钻和下套管时,()以控制下放速度。

A.刹慢滚筒

B.刹住滚筒

C.刹慢或刹住滚筒

D.控制猫头

考点:石油钻井工考试初级石油钻井工初级石油钻井工题库
题型:单项选择题

In 1998 consumers could purchase virtually anything over the Internet. Books, compact discs, and even stocks were (1) from World Wide Websites that seemed to (2) almost daily a few years earlier, some people had predicted that consuners accustomed to shopping in stores would be (3) to buy things that they could not see or touch (4) . For a growing number of time-starved consumers, however, shopping from their home computer was proving to be a convenient (5) to driving to the store.

A research estimated that in 1998 US consumers could purchase $ 7.3 billion of goods over the Internet, double the 1997 total. Finding a bargain was getting easier, (6) the rise of online auctions and Websites that did comparison shopping on the Internet for the best (7) .

For all the consumer interest, (8) in eyberspaee was still a largely (9) business, however. Internet pioneer Amazon. eom, which began selling books in 1995 and later (10) into recorded music and videos, posted (11) of $ 153.7 million in the third quarter, up from $ 37.9 million in the same period of 1997. Overall, (12) , the company’ s loss widened to $ 45.2 million from $9.6 million, and analysts did not expect the company to turn a profit (13) 2001. (14) the great loss, Amazon. tom had a stock market value of many billions, reflecting investors’ (15) about the future of the industry.

Internet retailing appealed (16) investors because it provided an efficient means for reaching millions of consumers without having the cost of operating (17) stores with their armies of salespeople. Selling online carried its own risks, however, (18) so many companies competing tor consumers’ attention, price competition was (19) and profit (20) thin or nonexistent.

2()

A. turn up

B. show up

C. bring up

D. spring up

题型:单项选择题

冷伤的发展过程可分为().

A.生理调节阶段

B.组织冻结阶段

C.复温阶段

D.全身冻结阶段

E.器官衰竭阶段

题型:单项选择题

王先生,40岁。突发上腹刀割样剧痛4小时,来院急诊。查体:体温38.5℃,血压120/70mmHg,心率88次/分,呼吸20次/分。全腹压痛、反跳痛,伴腹肌紧张,以剑突下及右下腹为显著,肠鸣音消失,移动性浊音(+)。血白细胞9.0×109/L,中性粒细胞84%。

为明确病因诊断,首选检查项目是()

A.急诊腹部CT

B.腹部B超

C.腹腔穿刺

D.直肠指诊

E.腹部立位平片

题型:单项选择题

头痛部位在一侧或两侧,属于

A.厥阴经

B.太阳经

C.阳明经

D.少阳经

E.督脉

题型:单项选择题

以下除哪项外均为乳核特点:

A.乳核是发生在 * * 的良性肿瘤

B.常见于20~25岁青年妇女

C.相当于西医乳腺纤维腺瘤

D.肿块表面光滑,推之活动

E.可见 * * 溢液

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