对绿脓杆菌和抗药金黄色葡萄球菌均无效的药物为
A.阿莫西林B.哌拉西林C.苯唑西林D.头孢拉定E.头孢他定
参考答案:A
在多项式4x2+1中,添加一个单项式,使其成为一个完全平方式,则添加的单项式是:( )(只写出一个即可)。
Which language do you speak at home?()
A.I speak English very well
B.I can speak English and French
C.English is my mother tongue
D.English, most of the time