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【单选题】
关于平面曲线运动,说法正确的是A.
没有固定的圆心，所以没有法线加速度
B.
用瞬时曲率半径ρ，替换圆周运动的半径R，即可按圆周运动中讲过的公式求其法线加速度
C.
加速度方向始终指向曲线的凸侧
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【简答题】依据我国宪法,信款的公民与不信教的公民享有同等的权利和义务,任何国家机关、社会团体和个人不得限制公民信仰宗教或者不信仰宗教, 不得歧视信仰宗教的公民和不信仰宗教的公民。____
【简答题】小康水平 货币投放量 市场监管 垄断行业 娱乐业 纳税人 经济危机 通货膨胀 假日经济 合资企业
【单选题】According to the passage, why were the remains of organisms trapped in swamps better preserved for the fossil record than those that were not?
A.
The swamp environment reduced the amount of bacterial decay.
B.
Swamp waters contained higher amounts of materials such as calcium carbonate.
C.
There were fewer sediments in swamps than in other bodies of water.
D.
Swamp vegetation accelerated the decomposition of organisms.
【单选题】刘先生, 23 岁,因车祸活动受限,摄 x 线片提示左髋关节脱位伴髋臼骨折,此时机体活动受限对机体运动系统的影响是( )
A.
失用性肌肉萎缩
B.
骨折
C.
肌张力增加
D.
骨关节炎
E.
骨坏死
【简答题】The most basic reason why dialects should be preserved is that language helps to ______ a culture A) retain B) relate C) remark D) review
【单选题】Why is the Student Action Union opposing the parking lot plan?
A.
Because they want to preserve the natural beauty of the campus.
B.
Because they want to protect the students' right for living space.
C.
Because they want to conserve the place for future use.
D.
Because they want to sell the place for a better price.
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