Many boys enjoy _______ football, basketball or baseball

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

岩心归位的原则是:以筒为基础,用___ 控制,在磨损面或筒界面适当___ ,泥岩或破碎处合理___ ,使整个剖面岩性、电性符合,解释合理,但岩心进尺、心长、收获率不改变。

岩心归位时以筒为基础，用（）控制，在磨损面或筒界面适当拉开。

岩心归位时以筒为基础，每筒岩心为归位单元，缺心留空白，套心（）。

Either he or I ______to the airport.

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

Duty is an act or a course of action that people ______you to take by social customs, law or religion.

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

（____）自动控制系统；（____）法律基础

Hurry up, or you ______ catch the train.

基础的形式一般分为条形基础、独立基础和________。