下列各组液体混合物，用分液漏斗不能分开的是A甲苯和液溴B溴乙烷和水 C水与煤油 D饱和碳酸钠溶液和乙酸乙酯
下列关于实验基本操作的叙述，不正确的是（）。A用蒸发皿进行加热蒸发时，不需要垫加石棉网即可直接进行加热B蒸馏实验中，要在烧瓶中加入几粒沸石或碎瓷片，以防止液体发
下列关于实验基本操作的叙述，不正确的是（）。A用蒸发皿进行加热蒸发时，不需要垫加石棉网即可直接进行加热B蒸馏实验中，要在烧瓶中加入几粒沸石或碎瓷片，以防止液体发生局部过热而暴沸C蒸馏时，冷凝水应从冷凝管上口进，下口出D分液时，分液漏斗中的下
已知反应：X+Y=M+N为放热反应，对该反应的下列说法正确的是（ ） A该反应为放热反应，因此不必加热即可反应BX能量一定高于MCX和Y的总能量一定高于M和N的
已知反应：X+Y=M+N为放热反应，对该反应的下列说法正确的是（ ） A该反应为放热反应，因此不必加热即可反应BX能量一定高于MCX和Y的总能量一定高于M和N的总能量DY能量一定高于N
下列可证明甲烷分子是正四面体结构的是A一氯甲烷没有同分异构体B二氯甲烷没有同分异构体 C三氯甲烷没有同分异构体D四氯甲烷没有同分异构体
下列可证明甲烷分子是正四面体结构的是A一氯甲烷没有同分异构体B二氯甲烷没有同分异构体 C三氯甲烷没有同分异构体D四氯甲烷没有同分异构体
Some tribes _______ with their cattle in search of fresh grass.AimmigrateBmigrat
Some tribes _______ with their cattle in search of fresh grass.AimmigrateBmigrateCemigrateDtransfer
They heard the_______ of swords and realized that the fighting began.AclashBcras
They heard the_______ of swords and realized that the fighting began.AclashBcrashCcrushDcollision
All the flights ______ because of the snowstorm, we had to take the train instea
All the flights ______ because of the snowstorm, we had to take the train instead.Awere canceledBhad been canceledChavin
______ native to North America, corn has now spread all over the world.AIn spite
______ native to North America, corn has now spread all over the world.AIn spite of BThat it isCIt wasDAlthough
Building roads by the British_______.Aput an end to a whole series of quarrels.B
Building roads by the British_______.Aput an end to a whole series of quarrels.Bprevented the Pathans from carrying on f
Which is the branch of linguistics which studies the characteristics of speech s
Which is the branch of linguistics which studies the characteristics of speech sounds and provides methods for their des
The function of the sentence “A nice day, isn’t it is”? . AinformativeBphaticCdi
The function of the sentence “A nice day, isn’t it is”? . AinformativeBphaticCdirectiveDperformative
What rhetorical device is used in the sentence: The room sat silent.APunBSimileC
What rhetorical device is used in the sentence: The room sat silent.APunBSimileCMetonymyDTransferred epithet
The word “transistor” is formed by joining together the initial part of “transfe
The word “transistor” is formed by joining together the initial part of “transfer” and the final part of “resister”, and
Assessment is viewed as an integral part of the teaching
Assessment is viewed as an integral part of the teaching-learning process. It involves collecting evidence of learning o
When a teacher intends to present or explain a new language point, which of the
When a teacher intends to present or explain a new language point, which of the following group methods is mostly recomm
What role does the teacher play in the deductive presentation of grammar?AInstru
What role does the teacher play in the deductive presentation of grammar?AInstructor.BPrompter.CParticipant.DNegotiator.
材料全屏下面是某英语教师在阅读课中导入部分与学生的互动。请回答以下问题教学片段:T: Do you like football?S1: Yes.T: Which
材料全屏下面是某英语教师在阅读课中导入部分与学生的互动。请回答以下问题教学片段:T: Do you like football?S1: Yes.T: Which football teams do you like best?S1: Now
从提问的形式来看，英语课堂提问的类型有哪些？
从提问的形式来看，英语课堂提问的类型有哪些？
What instruction does the teacher give in class? Choose from the options what th
What instruction does the teacher give in class? Choose from the options what the teacher wants to do. Quiet now, please
When we talk about the element of the teaching aims “ABCD”, what does the “C” re
When we talk about the element of the teaching aims “ABCD”, what does the “C” refer to?AcontentBcapacityCconditionDcompe
