压缩机润滑油的作用就是为了减少摩擦表面的磨损。

When an important holiday comes, I usually think of what gifts to buy or prepare for my family members. It is the act itself rather than the thing you buy   小题1:  matters. Either a small present, a text message or a phone call can mean a lot to the receivers.   小题2: , I had never got anything from my son, who is a university student. Parents never forget to celebrate their children’s birthday, but their children seem to be very   小题3:  (forget).They seldom do something in return.

Life is unpredictable, and you never know what will happen tomorrow. When my son came back during the summer vacation, my wife and I, as usual,   小题4:  (meet) him at the station. On arriving home, much   小题5:  my surprise, my son took out a wrist watch and gave it to me,  小题6:  (say) it was a birthday gift for me. It is a very fashionable watch,   小题7:  shows not only hours, minutes and seconds but days as well. You can imagine how surprised and excited I was at that moment.

Some people say children get too much care and love from their parents and just take them for granted.   小题8:is natural for people to have such concerns and worries, but things may not turn out as badly as 小题9: (expect).We need to look more at the positive side of life, as a famous writer once said, “Life is   小题10: best classroom one can never get.”

城市规划主管部门要会同建设、房地产主管部门将住房建设规划纳入当地国民经济和社会发展中长期规划和近期建设规划，按建设资源节约型和环境友好型城镇的总体要求，合理安排套型建筑面积（）住房为主的普通商品住房和经济适用住房布局。

A.90m²以下

B.90m²以上100m²以下

C.100m²以下

D.100m²以上120m²以下

麻绳的优缺点？

鼻端生红色粉刺称“酒齄鼻”，多因（）

A.肺脾蕴热

B.肝经湿热

C.阴寒腹痛

D.阳虚水停

E.气血亏虚

当三只锥形牙轮中心线与钻头中心线交于一点时，钻头转动，这时牙齿对井底（）作用。

A.碾压和破碎

B.切刮

C.破碎和切刮

D.碾压和切刮