正确答案: D

存在于神经肌肉接头的终板膜上

题目：下列关于M型受体的叙述，错误的是（　　）

解析：略

查看原题 查看所有试题

学习资料的答案和解析：

[单选题]“Would you be_________do it for me，please?”“Of course，with pleasure．”

SO kind as to

[单选题]What prompted Sequoyah to develop his alphabet?

Sequoyah was a young Cherokee Indian．son of a white trader and an Indian Squaw(北美印第安女人)．At an early age，he became fascinated by“tile talking leaf”，an expression thathe used to describe the white man’s written records．Although many believe this"talking leaf”to be a gift from tile Great Spirit，Sequoyah refused to accept that theory．Like other Indians oftile period，he was illiterate，but his determination to remedy tile situation led to the inventionof a unique 86 character alphabet based on the sound patterns that he heard． 　　His family and friends thought him mad，but while recuperating(恢复)from a huntingaccident．he diligently and independently set out to create a form of communication for his ownpeople as well as for other Indians．In l821，after twelve years of work，he had successfully de。veloped a written language that would enable thousands of Indians to read and write． 　　Sequoyah’s desire to preserve words and events for later generation has caused him to be remembered among the important inventors．The giant redwood trees of-California，called“se-quoias(红杉)”in his honor，will further imprint his name in history． 根据以上内容，回答下面的题目。What is the most important reason that Sequoyah wiU be remeIll]bered?

Future generations．

[单选题]根据下列短文，回答{TSE}题。　　Despite the fact that today viruses(病毒)are known to cause cancer in animals and incertain plants，there exists a great reluctance to accept viruses as being of importance in humancancer．Basic biological phenomena generally do not differ strikingly as one goes from one spe—cies to another．It should be recognized that cancer is a biological problem and not a problemthat is unique for man．Cancer originates when a normal cell suddenly becomes a cancer cellwhich multiplies widely and without apparent restraint．Cancer may originate in many differentkinds of cell，but the cancer cell usually continues to carry certain traits(特性)of the cell of origin．The transformation of a normal cell into a cancer cell may have more than one kind of cause．but there is good reason to consider the relationships that exist between viruses and cancer．　　Since there is no evidence that human cancer，as generally experienced，is infections，manypersons believe that because viruses are infections agents they cannot possibly be of importancein human cancer．However，viruses can mutate(突变)and examples are known in which a vi．rus that never kills its host can mutate to form a new strain of virus that always kills its host．Itdoes not seem unreasonable to assume that an innocuous(无害的)latent(潜伏的)virus mightmutate to form a strain that causes cancer．Certainly the experimental evidence now available isconsistent with the idea that viruses as we know them today，could be the causative(引起……的)agents of most，if not all cancer。including cancer in mall．{TS}Cancer should be considered to be a biological problem rather than a medical one because_________．

results of experiments on plants and animals do not vary greatly from species to species

[单选题]已知△ABC的顶点为A(-4，1)，B(1，-1)，C(3，4)，则△ABC是（　　） (A)锐角三角形(B)直角三角形 (C)等边三角形(D)等腰三角形

[单选题]视神经乳头 （　　）

视网膜中央动脉穿过