问题
单项选择题
在下列各种外毒素中，属于神经毒素的是
A．产气荚膜梭菌α毒素
B．红疹毒素
C．肉毒毒素
D．白喉毒素
E．葡萄球菌毒性休克综合征毒素
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
在下列各种外毒素中，属于神经毒素的是
A．产气荚膜梭菌α毒素
B．红疹毒素
C．肉毒毒素
D．白喉毒素
E．葡萄球菌毒性休克综合征毒素
参考答案：C
Columbus returned home with the news of his discovery of “Indian” 36 Columbus called it. Then he was considered as the hero who had given a new world to Spain. Never had so great __37__ been shown to any __38__man.But there were some who were jealous of the __39__.”Who is this Columbus?” they asked, “and what has he done? Isn’t he a poor sailor from Italy？And could __40__ other seamen sail across the ocean just as he has done?” One day Columbus was at 41 and several of these fellows were __42__ too. They tried to make Columbus __43__.”You have discovered strange lands __44__ the sea,”they said.“But we don’t see why there __45__ be so much said about it. Anybody can sail across the ocean and anybody can coast along the islands __46__ ,just as you have done. It is the __47__ thing in the world.” Columbus made no answer, but after a while he took an egg from a dish and said to the people at the table, “Who __48__ you, gentlemen, can make the egg stand __49__ ?” One by one they tried the __50__．When the egg had gone __51__ around and everyone had failed, all said that it could not be done, Then Columbus took the egg and __52__the shell of the egg’s small end a little upon the table. After that there was no trouble in making it stand __53__.“Gentlemen,”said he, “what is easy than to do this __54__ you said was impossible ? It is simplest thing in the world. Anybody can do it-----AFTER HE HAD BEEN SHOWN __55__.” 小题1:A. so B. when C as D. that
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