John ___confidence not only from his teacher’s encouraging words but also from his success this time.

A．came up to

B．acquired

C．promoted

D．made out

对治疗流脑抗生素的描述错误的是（）

A.青霉素容易透过血脑屏障

B.氯霉素因对骨髓有抑制作用，一般不首选

C.为保证疗效，可选用头孢噻肟

D.为降低费用，可选用磺胺药

E.青霉素为目前国内外治疗流脑的高效、低毒、价廉的抗生素