Health experts in many countries still _________ their ideas about the relationships between our food and our health.

A．have tested

B．tested

C．are testing

D．test

患者，男，19岁。手足心热，夜眠多梦，时有遗精，舌质红，脉细数。用药宜首选

A．黄连、黄柏

B．黄芩、黄连

C．黄芩、黄柏

D．黄柏、知母

E．白果、莲子