苯及其同系物多为液体,都具有芳香气味,但苯蒸气有毒。

题型:判断题

问题:

苯及其同系物多为液体,都具有芳香气味,但苯蒸气有毒。

考点:机动车维修技术有机化学基础知识有机化学基础知识题库
题型:判断题

用NA表示阿伏德罗常数,下列叙述正确的是(  )

A.5.6gFe和足量的盐酸反应时,失去的电子数为0.2NA

B.标准状况下,22.4LH2O含有的分子数为1NA

C.标准状况下22.4L氢气和氧气的混合气体所含分子总数为NA

D.0.5mol/L的MgCl2溶液中,含有Cl-个数为NA

题型:判断题

甲电器生产厂家依法注册商标使用在电冰箱上。由于该厂生产的电冰箱质量较好,价格也不高,比较受消费者的喜欢。乙电器生产厂家成立不久,生产规模不大,也没有自己的注册商标。为了让自己的产品尽快走入市场让消费者接受,乙电器生产厂家准备采取一种策略,即先使用他人有一定影响的注册商标,待自己的产品有一定的市场之后再注册自己的商标。于是,乙厂与甲厂就商标使用许可一事进行磋商。以下有关商标使用许可的形式和程序错误的说法是()

A.双方应签订使用许可合同

B.共同向商标局提出使用许可申请

C.商标使用许可合同应当报商标局备案

D.在使用许可合同签订之日起3个月内,由许可人将合同副本报送商标局备案

题型:判断题

关于平衡计分卡的说法,正确的是()。

A.平衡计分卡的运用解决了过度强调财务指标的问题

B.运用平衡计分卡的过程中,无须高层管理者的参与

C.平衡计分卡的运用保证了评估体系对企业战略的支持

D.平衡计分卡的实施成本较低

E.平衡计分卡的运用实现了评估系统与控制系统的结合

题型:判断题

Rover advertised in the Daily Echo the sale of a unique original painting by a famous Italian artist. The price for the rare painting was $50,000·00, and Rover undertook to sell the painting to the first person that signified acceptance by telephoning him on a given telephone number. Piper sent an email message to Rover offering to pay $45,000·00 for the painting. Rover ignored the email message and decided to sell the painting to Chancer, who offered $48,000·00 by telephone.Piper is now prepared to pay $50,000·00 to Rover. Piper is so desperate to secure the painting that he is prepared to approach the High Court to obtain an interdict to prevent the sale of the painting by Rover to Chancer.Required:In relation to the law of contract, discuss:

(b) What would be Piper’s likely prospects of success if he were to approach the High Court to obtain an interdict to prevent the sale of the painting by Rover to Chancer. (2 marks)

题型:判断题

以下哪种肺癌副癌综合征的说法是不正确的?()

A.重症肌无力

B.库欣综合征

C.中叶综合征

D.感觉性神经病

E.类癌综合征

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