【简答题】小明在手工课上做了一个很好看的飞机,根据桑代克的“效果律”教师的那些行为会让小明更加喜欢做手工?
【单选题】What were they going to do before they went to the theatre?
A.
They would have a meal first.
B.
They would go shopping first.
C.
They would go to the post office.
【简答题】列车起动时,几乎没有()阻力,以轴颈与轴承的摩擦为主。
【简答题】. 根据引起感染病原体来源的不同,可将感染分为_____和_____。