搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1/A2型题

具有感染性的HBV完整颗粒为（）。

A.小球形颗粒

B.管型颗粒

C.Dane颗粒

D.异染颗粒

E.硫磺颗粒

答案

参考答案：C

解析：Dane颗粒为具有感染性的HBV完整颗粒，直径为42nm，由包膜和核衣壳组成。

单项选择题

A quarter of the world’s population now speaks English. If you want to 16 your products, or yourself, you have no choice 17 to do it in English. Politicians and business people must speak English if they want to make their mark 18 the world’s stage. Writers of minority languages can 19 hope to sell their books unless they write in English.As English is spoken all over the world, it means that no individual country can really exercise a 20 influence over it. In the past, it was the mother tongue 21 who controlled the future of the language. Now, indeed for the last few decades, the mother tongue users are in a significant 22 .This means that the character of the language could well 23 with new words, new rhythms, and new pronunciations. It isn’t going to be British and American English anymore- that’s 24 . All over the world education authorities are struggling to find the resources to meet the 25 for English.However, it is open to question whether they are putting all their eggs in one 26 . The future of English language is intimately 27 the electronic revolution. Satellite television and the Internet have helped accelerate the 28 of English, but will that always be the caseThe Internet, 29 , is now seen as the saviour of minority languages. Indeed, with the continuing improvements in electronic translation, will we even need a(n) 30 language It is open to question.

A．speakers

B．followers

C．believers

D．interpreters
查看答案
单项选择题

临床上，导致喉返神经损伤的外科手术不可能是（）

A.甲状腺手术

B.前颅底手术

C.甲状旁腺手术

D.食管手术

E.侧颅底手术
查看答案