在设计与制造钻头时通常采用具有（）结构的牙轮以增大钻头在井底工作时的滑动量。A、超顶

因税收、继承、赠与可以依法无偿取得票据的，不受给付对价的限制，所享有的票据权利有优于其前手的权利。（）

下列哪项指标是进行肺移植的适应证（）。

A.FEV₁<20%

B.FEV₁<30%

C.FEV₁<40%

D.FEV₁<50%

E.FEV₁<60%

* * 前后壁修补术适应证()

A．Ⅰ、Ⅱ度 * * 前、后壁脱垂者

B．Ⅰ、Ⅱ度子宫脱垂者

C．Ⅱ、Ⅲ度 * * 前后壁脱垂者

D．Ⅲ度 * * 前壁脱垂者

E．Ⅲ度 * * 后壁脱垂者

(二) For any Englishman, there can never be any discussion as to who is the world’s greatest dramatist. Only one name can possibly suggest itself to him : that of William Shakespeare. Every Englishman has some knowledge, however slight, of the work of the greatest writer. All of us use words, phrases and quotations from Shakespeare’ s writings that have become part of the common property of theEnglish - speaking people. Most of the time we are probably unaware of the source of the words we used, rather like the old lady who was taken to see a performance of Hamlet and complained that it was full of wellknown proverbs and quotations. Shakespeare, more perhaps than any other writer, makes full use of the great resources of the English language. Most of us use about five thousand words in our normal use of English; Shakespeare in his works used about twentyfive thousand. There is probably no better way for a foreigner to appreciate the richness and variety of the English language than by studying the various ways in which Shakespeare used it. Such study is well worth the effort (it is not, of course, recommended to beginners) even though some aspects of English usage, and the meaning of many words, have changed since Shakespeare’ s day.

According to the author of this passage,______

A．we use all the words, phrases and quotations from Shakespeare’s writings.

B．Shakespeare’s writings have become the property of those who are learning to speak English.

C．it is likely to true that people often do not know the origin of the words they use.

D．all the words that English -speaking people use are taken from the writings of Shakespeare.