
细菌对磺胺类药物产生耐药性的机制,正确的是
A.细菌产生水解酶,使磺胺类药物水解B.细菌产生钝化酶,使磺胺类药物失活C.菌体内靶位结构发生改变D.PABA产生增多E.细菌细胞膜通透性发生改变


A.细菌产生水解酶,使磺胺类药物水解B.细菌产生钝化酶,使磺胺类药物失活C.菌体内靶位结构发生改变D.PABA产生增多E.细菌细胞膜通透性发生改变
Read the following statements carefully and then decide whether they are true or false. Put a “T” if you think the statement is true and an “F” if it is not.
( ) 1. People in the UK spend about most of the free time in the pub.
( ) 2. The Royal National Theatre often performs in Stratford-upon-Avon, Shakespeare’s birthplace.
( ) 3. With the emergence of the Beatles, the Rolling Stones, and the Who, British popular music led the world from the early 1980s.
( ) 4. British Library, the national library, is one of the world’s three largest.
( ) 5. The UK’s biggest-selling newspaper is The Times.
( ) 6. Channel 4 is state-owned, though it operates in a commercial law.
( ) 7. The national sport of the UK is rugby.
( ) 8. Cricket is popular in all the four home nations.
( ) 9. Golf was born in Scotland.
( ) 10. Tennis is the heist profile sport for the two weeks of the Wimbledon Champion-ships.