【简答题】We have in the past ________ that we have y not only of the land but of the sea... We have not. Life goes on there just as it did from the ________.
【简答题】人体缺乏会导致坏血病的维生素是 ;人体缺乏会导致脚气病的维生素是 。
【简答题】人体缺乏会导致坏血病的维生素是 ;人体缺乏会导致脚气病的维生素是 。
【简答题】人体缺乏会导致坏血病的维生素是 ;人体缺乏会导致脚气病的维生素是 。
【单选题】Which of the following statements is true according to the passive?
A.
We have about the same amount of passive sleep and active sleep.
B.
We usually have less passive sleep than active sleep.
C.
Passive sleep is often followed by active sleep.
D.
Passive sleep comes after active sleep.