The basic essentials of the first language are acquired in the short period from about age two to puberty,which is called the c____period for first language acquisition.

The clinical stage of vitamin D deficiency rickets is A: Early period, middle period, late period B: Initial period, peak period, recovery period C: Early stage, acute period, recovery period, sequelae period D: none of the above

​( ) is an important period to determine the kernel weight of rape.‍ A: Seedling period B: The pod development and maturity period C: Bud period D: Flowering period

When is our English class every week A: Period 1-2 Monday; Period 3-5 Wednesday B: Period 3-5 Monday; Period 8-9 Thursday C: Period 8-9 Monday; Period 3-5 Thursday D: Period 1-2 Monday; Period 3-5 Thursday

Which<br/>period does William Shakespeare belong to? ____ A: Anglo-Saxon<br/>period B: Norman<br/>Period C: Elizabethan<br/>Period D: Restoration<br/>Period

According to the video, whatwas the1950s of the U.S.A. called? A: a period of consensus B: a period of discord C: a period of concord D: a period of discredit

‌Which period does Wang Wei, the predecessor of literati painter belong to? ‎ A: Early Tang period B: High Tang period C: Late Tang period D: Pre-Tang period

Which of the following is the most recent period in the evolution of newspaper online business models A: Print-centric period B: Integrated Print/Web period C: Digital First period D: Convergence period

Which stage of culture shock is full of observations and new discoveries？（ ） A: adjustment period B: honeymoon period C: crisis period D: mastery period

Which period of Mark Twain’s life had the strongest and most enduring influence on his literary career? A: The Southern period B: The Western period C: The Northern period D: The Eastern period