主页
学科
搜索
账户
常见问题
当前学科:高级井下作业工
题目:
单选
使用LZ型螺杆钻具,允许的修井液开始砂量小于()
A . A、2%
B . B、8%
C . C、15%
D . D、10%
答案:
<查看本题扣1积分>
查看答案
答案不对?请尝试站内搜索
推荐知识点:
下列矿物中,硬度比石英大的是()
多点测斜是自下而上进行测斜,故测点编号也是自下而上编码。
食品安全监督管理部门对食品可以实施免检。
养鱼池塘保持池底淤泥厚度以()厘米为宜
企业的高级管理人员为了减轻处理纷乱繁琐的日常事物的负担,把例行的一般日常事务授权给下管理人员去处理,自己只保留对例外事项的决定权和监督权。体现了一下哪种管理体制()。
The popularity of tattoos did not 11____ into the 20th century; it slowed down and continued only among soldiers and sailors. These men 12____ each other to get tattooed to show how strong they were. As a result, the general public , began to think of people with tattoos as from the lower classes. However, in the late 20th century , a new 13____ appeared as young people started to get tattooed. This body art 14____ began to appear in unusual places , not only on arms , but also on legs and backs. Tattoo artists began to 15____ in new equipment, ink, and designs. To keep their 16____ , they opened shops in fashionable places where they could make greater 17____. Actors and musicians got "tats ," and many 18____ words came into use. As people became more 19____ about this form. of body art, tattoos became more 20____ because patterns , or "flash," were more complex. Despite this enthusiasm, however, the trend has begun to slow down, and soon it may be a thing of the past.
育成期常采用的光照方法有()、恒定光照法、渐减光照法三种。
为克服市场经济对医学服务产生的负面影响,要求临床医师()
为了培养剪纸艺术人才,柘荣县以中小学为载体,建立中小学剪纸培训基地,将剪纸列入中小学乡土教育课程。这表明()
升温时冷却回平衡缸温度不致沸腾的是()阀。