首页
普通专升本
成人高考
学位英语
在线刷题
最近学习
最近学习课程
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
您现在位置：
模拟考场
>
湖北成人高考
>
专升本
>
医学综合
>
浏览试题
[单选题]
下列关于视锥细胞的叙述，错误的是( )
A
感受暗光
B
分辨力高
C
对光敏感性弱
D
能分辨各种颜色
E
主要分布在视网膜的中央部分
收藏
查看答案
参考答案
试题答案：
A
答案解释：
相关题目
黄韧带
输血最严重的并发症是( )
请根据以下答案，回答103-104题
可兴奋细胞发生兴奋时的共同标志是( )
代表副神经的罗马数字是( )
可出现二心音固定分裂的疾病是( )
关于肝脏，下列叙述错误的是(??)
声音传向内耳的主要途径是（ ）
关于三叉神经的叙述正确的是（ ）
位于冠状沟后部的结构是(??)
热门试题
1.
美国东南部农田弃耕后恢复演替，这是一种( )
2.
27、下列破产申请受理前一年内涉及债务人的行为中，管理人有权请求人民法院予以撤销的有
3.
10．世界银行集团的主要宗旨是
4.
3. Friction is a force which opposes motion. Much of the energy supplied to a complicated machine with many moving parts is wasted in overcoming this opposition. The energy is converted into useless heat. The amount thus lost can be considerably reduced and the life of the machine prolonged by careful lubrication. This reduction improves the efficiency of the machine. Another way in which friction is reduced is to substitute roller or ball bearings for the earlier type of bearing, in which the surfaces in contact move by sliding. Bearings of these later types are used very extensively in many kinds of modern machinery.It must not be assumed, however, that friction is always a disadvantage. In many instances it is highly important. Belts are often used in conveying power from one machine to another. In the absence of friction, this could not be done. The driving wheel would not run the belt, neither would the belt run the wheel to driver. Without friction, then, belted machinery could not be used. Again in the case of all motor vehicles, friction is essential in the operation of the brake. Were there no friction, there could be no brake. But even this illustration does not give an adequate picture of the importance of friction. The vehicle could not even be started if it were not for the friction exerted between the tires and the road. Nails hold in wood, and screws hold in either wood or metal by reason of friction, without which they would be useless. Walking is difficult enough on an icy pavement, but it would be wholly impossible if there were no friction at all between the shoe and the pavement.(5分)3.1 Friction arises when____.(1分)A. an opposing force of motion exists B. the energy is wastedC. everything is motionlessD. a complicated machine is supplied with energy
5.
国家机构
热门试卷
成人高考专升本《政治》模拟试卷
去做题
已有3410做题
2020年湖北成人高考专升本政治模拟试题三
去做题
已有2205做题
成人高考专升本政治考试模拟试题及答案(1)
去做题
已有1893做题
湖北成考专升本政治真题（2021年）
去做题
已有1324做题
成人高考高起点语文考试高分突破试题及答案四
去做题
已有1189做题
