Chinese chess has a history of more than 2, 000 years. Today it still interests _______ the young _______ the old.
A:both; and
B:either; or
C:not; but
D:neither; nor
This morning I have art lesson, and art is easy subject.
在绿色植物体内,ADP转化为ATP时,所需能量来源于 ( )
甲
乙
丙
①
盐酸
Na2CO3溶液
Ca(OH)2溶液
②
K2CO3溶液
CaCl2溶液
③
Ba(OH)2溶液
④
BaCl2溶液
( )