问题
单项选择题
KXJ-114安全洗井器适用于（）油田，是起油层保护作用的井下工具。
A、低渗低压
B、低渗高压
C、高渗低压
D、高渗高压
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
KXJ-114安全洗井器适用于（）油田，是起油层保护作用的井下工具。
A、低渗低压
B、低渗高压
C、高渗低压
D、高渗高压
参考答案：A
Last summer, my mother and I went to her hometown, Guilin. The city is very ___ in the world ____ it has beautiful rivers and hills. Many ____from different countries around the world go to _____ it every year. My motherwasborn _____ a small village near the Li River. When she ____a little girl, she studied at the village school ____ only five classes and seven _____. Some children were very ____ and didn’t like to study at school, ____ my mother was well-behaved. The teachers were very strict but very friendly.
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