WHAT IS SHOWN BY PUTTING LEMON JUICE ON YOUR TONGUE

70. - 2 DE THI THU DAI HOC CHUYEN THAI BINH CO DAP AN
Tiếng Anh 2 DE THI THU DAI HOC CHUYEN THAI BINH CO DAP AN
70. What is shown by putting lemon juice on your tongue? A. It shows that you have a high level of arousal if no saliva is produced. B. It indicates your level of arousal by amount of saliva that is produced. C. It can indicate whether your saliva is more acidic or more alkaline. D. It is a good test of your sense of taste.