【多选题】截面法是计算结构指定截面内力的基本方法,其计算步骤可以简单的概括为( )。
【单选题】商业职能中,最主要,最本质的职能是( )
【单选题】Animals can strengthen their immune system in preparation for winter because ______.
A.
when season changes, the central nervous system reacts to environment and that sparks changes in the body's immune system
B.
animals have shorter exposure to light in winter than in summer
C.
animals have evolved to select the best time to breed and be able to predict the change of conditions
【单选题】When did Winter Vinecki form Team Winter for prostate cancer research and awareness?
A.
After her father died.
B.
10 months later after her father was diagnosed with prostate cancer.
C.
When her father was first diagnosed with prostate cancer.
D.
When she was 15 years old.
【判断题】中美贸易战破坏了中国和平崛起和快速发展的外部环境
【单选题】— I heard they went skiing in the mountains last winter. — It _____ true because there was little snow there. [ ]
【单选题】When might this announcement be heard?