短文改错 As a middle school student of Senio

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短文改错

As a middle school student of Senior Three, I do sports one and two hours a day, such as doing morning exercises, playing basketball and long-distance running. I think it is real helpful to me. Take exercise makes me even more healthy so that I won’t be ill very often. What’s more, I also get myself relaxing in different kinds of sports. Only in this way I do a better job in my study in high spirit. By doing physics exercise, I’m becoming stronger and confident than ever. I do not think that this is necessary for everyone to spend a little time on sports every day because people’s health is the most important one in modern life.

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外科医生做手术或紧急治疗运动员扭伤时,常用沸点为13.1℃的液态氯乙烷做麻醉剂,把氯乙烷喷到局部皮肤上,皮肤会在一段时间内失去疼痛感,这时由于氯乙烷在常温下易[ ]

A.汽化吸热

B.凝固放热

C.熔化吸热

D.升华吸热

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女,58岁,突然出现心慌,伴短暂晕厥。心电图:宽大畸形的QRS波群的心动过速,QRS波群的振幅和波峰方向呈周期性改变,围绕等电基线扭转。该病人诊断为何种类型心律失常()

A.室上性心动过速伴室内差异性传导

B.窦性心动过速

C.阵发性室性心动过速

D.加速性室性自主心律

E.尖端扭转型室性心动过速

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根据植物新品种保护条例及相关规定,下列哪些行为可以不经品种权人许可,不向其支付使用费

A.利用授权品种进行育种及其他科研活动

B.农民自繁自用授权品种的繁殖材料

C.为了商业目的销售不知道是侵权品种的繁殖材料,但能够证明其合法来源

D.为商业目的重复使用授权品种的繁殖材料生产另一品种的繁殖材料

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为观察细胞的生长状况,适合选用的显微镜()。

A.普通光学显微镜

B.暗视野显微镜

C.倒置显微镜

D.荧光显微镜

E.电子显微镜

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