一杯制作失败的Espresso,其克立码(Crema)会()A、有光泽 B、颜色为白

题型:单项选择题

问题:

一杯制作失败的Espresso,其克立码(Crema)会()

A、有光泽

B、颜色为白色

C、颜色呈榛子色

D、状态易于复原

考点:咖啡师考试咖啡师考试题库
题型:单项选择题

“荧光粉”所用的高纯度氯化钙中若混有镁离子,除去的方法是把氯化钙的水溶液加热到90-95℃,在不断搅拌的条件下加入适当的沉淀剂,使镁离子生成沉淀过滤除去.此沉淀剂最好是(  )

A.烧碱

B.纯碱

C.小苏打

D.石灰浆

题型:单项选择题

肺与外界的气体交换是通过呼吸运动实现的.当胸廓容积扩大时,其内压强与大气压的关系是(  )

A.大于大气压

B.等于大气压

C.小于大气压

D.先大于大气压后小于大气压

题型:单项选择题

Most "unassertive" people are not confident and take no for an answer much too easily. There is a growing awareness in our society that this tendency (1) the rights of large numbers of people. For example, in recent years there has been an upsurge in (2) and pressure groups. This is a (3) as there will always be a need for such organizations to (4) individuals and minorities in a competitive society. The danger is that we (5) for our rights and lose the art of asserting ourselves. It is better for (6) with other people if you can learn (7) for yourself.
Now, we have to learn to ignore some of the (8) that may be ringing in our unconscious minds, such as: "If you ask once more, I’ll flatten you", and " (9) ".
The main technique that we use in (10) to practice the art of persistence is called Broken Record. (11) we hear one sentence over and over again until we reach screaming pitch and (12) .
Broken Record is the skill of being able to repeat over and over again, (13) , what it is you want or need, until the other person gives in or (14) .
Now, this technique is extremely useful for dealing with situations where your rights are clearly (15) , or coping with situations where you are likely to be diverted by clever, (16) .
The beauty of using Broken Record is that you (17) because you know exactly what you are going to say, however (18) the other person tries to be.
As with most assertive techniques, it must be used appropriately. It is (19) and is not designed to foster deep, interesting conversations and friendships with people! It is primarily of use in situations where (20) .

题型:单项选择题

红外光谱、质子核磁共振谱(PMR)是研究有机物结构的重要方法之一。

(1)在研究的化合物分子中--所处环境完全相同的氢原子在PMR谱中出现同一种信号峰。如

(CH3)2CHCH2CH3在PMR谱中有4种信号峰。又如CH3-CHBr=CHX存在着如下的两种不同空间结构:

因此CH3-CHBr=CHX的PMR谱上会出现氢原子的四种不同信号峰。在测定CH3CH=CHCl时,能得到氢原子给出的6种信号峰。由此可推断该有机物一定存在__________种不同的结构,其结构简式分别为_________________。

(2)有机化合物A含碳77.8%,氢为7.40%,其余为氧,A的相对分子质量为甲烷的6.75倍。

①通过计算确定该有机物的分子式____________________

②红外光谱测定,A分子结构中含有苯环和羟基。在常温下A可与浓溴水反应,1molA最多可与2molBr2作用,据此确定该有机物的结构有_______种,写出其中一种与溴水反应的化学方程式____________________________

题型:单项选择题

报关员向海关工作人员行贿,被海关处以暂停执业、取消报关从业资格处罚的,不适用于《中华人民共和国海关对报关员记分考核管理办法》。 ( )

更多题库