蓝牙技术其正常的工作范围在（）M半径范围之内

[单选题]Passage 2Americans no longer expect public figures, whether in speech orin writing, to command the English language with skill and gift. Nor do theyaspire to such command themselves. In his latest book, Doing Our Own Thing: TheDegradation of Language and Music and Why We Should ,Like, Care, JohnMcWhorter, a linguist and controversialist of mixed liberal and conservativeviews ,sees the triumph of 1960s counter-culture as responsible for the declineof formal English.Blaming the permissive 1960s is nothing new, but this is not yetanother criticism against the decline in education. Mr. McWhorter’s academicspeciality is language history and change, and he sees the gradualdisappearance of “whom”, for example, to be natural and no more regrettablethan the loss of the case-endings of Old English.But the cult of the authentic and the personal ,“doing our ownthing”, has spelt the death of formal speech, writing, poetry and music. Whileeven the modestly educated sought an elevated tone when they put pen to paperbefore the 1960s, even the most well regarded writing since then has sought tocapture spoken English on the page. Equally, in poetry, the highly personal,performative genre is the only form that could claim real liveliness. In bothoral and written English, talking is triumphing over speaking, spontaneity overcraft.Illustrated with an entertaining array of examples from both highand low culture, the trend that Mr. McWhorter documents is unmistakable. But itis less clear, to take the question of his subtitle ,why we should, like, care.As a linguist, he acknowledges that all varieties of human language, includingnon-standard ones like Black English, can be powerfully expressive-there existsno language or dialect in the world that cannot convey complex ideas. He is notarguing, as many do, that we can no longer think straight because we do nottalk proper. Russians have a deep lovefor their own language and carry large chunks of memorized poetry in theirheads, while Italian politicians tend to elaborate speech that would seem old-fashionedto  most English-speakers. Mr. McWhorteracknowledges that formal language is not strictly necessary, and proposes noradical education reforms-he is really grieving over the loss of somethingbeautiful  more than useful. We now takeour English   "on paper platesinstead of china". A shame, perhaps, but probably an inevitable one.According to the last paragraph, "paper plates" is to "china" as _______.

[单选题]下面关于DispatchAction的说法正确的是（）

[单选题]某海上运输公司为预防极端天气对公司运营的影响，与银行签订应急资本协议，规定当公司船队遭遇极端恶劣天气时，由银行提供资本以保证公司的持续经营，该船队采用的风险管理策略工具是()。

[单选题]在没有脚手架或者在没有栏杆的脚手架上工作，高度超过（）m时，应使用安全带或采取其他可靠的安全措施。

[问答题]为什么接地开关置接地位（负端）时，主电路高电位DJ动作，而低电位DJ却不能动作？

[多选题]税率的基本形式有（）。

[单选题]男性，27岁，农民。11月23日以"发热、头痛、腰痛2天"入院，自行口服"感冒药"无好转。查体：醉酒貌，腋下见条痕状出血点，上腹部压痛。该病主要的病理改变是（）

[单选题]半夏泻心汤组成中含有的药物是（　　）。

[单选题]在各种化学性致癌物中致癌谱广，致癌力又强的是（）。

[单选题]青菜价格之所以随着气候等诸多因素的变化而上下波动，主要是因为这些因素变化直接影响了青菜的（） ①供应数量 ②价值 ③使用价值 ④供求关系