根据课文内容填词：（共10小题，每小题0.5分，满分5分）

So why has English changed over time? 小题1:   all languages change and develop when cultures meet and  小题2:    with each other. At first the English spoken in England between about AD 450 and 1150 was very different from the English 小题3:  today. It was based more on German than the English we speak at present. Then   小题4:between about AD 800 and 1150, English became   小题5:  like German because those who ruled England spoke first  小题6:  and later French. These new settlers   小题7: the English language and especially its   小题8: . So by the 1600's Shakespeare was able to make use of a wider vocabulary than ever before. In 1620 some British   小题9:  moved to America. Later in the 18th century some British people were taken to   小题10:  too. English began to be spoken in both countries.

应在pH4以下药液中使用（）

A.山梨酸钾

B.尼泊金类

C.30%甘油

D.苯甲酸类

E.75%乙醇