抑制DNA回旋酶，使DNA复制受阻，导致细菌死亡的药物是
A．甲氧苄啶B．诺氟沙星C．利福平D．红霉素E．对氨基水杨酸
参考答案：B
At times, worrying is a normal _____ to a difficult event or situation-a loved one being _____ in an accident,
for example. [ ]
A. response; injured
B. reaction; wounded
C. reply; hurt
D. reflection; died
什么是血型?
