5:13=2052=1.2:3.12.
故答案为:20,3.12.
Farmers here _________keeping the soil rich and _________diseases.
A.focus on…free of
B.center … free from
C.attend on… free of
D.depend on… free from
境外生产的药品在中国上市销售的注册申请是( )。
A.临床研究申请B.新药申请C.已有国家标准的药品申请D.进口药品申请E.补充申请