What he is reading is a quarterly containing _________ of doctoral theses in progress.

A．Baghdad was once the center of Islamic trade.
B．There was ancient Greek medical thought in the Islamic medical system.
C．European scholars began to have interest in Islamic medicine in ninth century.
D．Chinese practices of feeling the pulse began in the seventeenth century.

A．state of being infected seriously
B．state of being polluted seriously
C．stafe of being made resistant to a war
D．state of being made resistant to a disease