Heavy coffee or tea, can stimulate the central nervous system and produce an increase in alertness and activity, produce anxiety and drastic mood swings at one time. The statement is（ ）.
A.right
B.wrong
正确答案是A
Heavy coffee or tea, can stimulate the central nervous system and produce an increase in alertness and activity, produce anxiety and drastic mood swings at one time. The statement is（ ）.
A.right
B.wrong
正确答案是A