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答案见上(2) [-6,10] 解析 方法一(基底法) 圆心 O到直线ax P +by+c=0的距离 d=(|c|)/(√(a^2+b^2))=1 = 1, M N A 如图②, 设 MN的中点为 图② A,连接OA , 则 OA⊥MN , cos∠MOA=d/(OM)=1/4 OM 4 则 (PM)⋅(PN)=((OM)-(OP))⋅((ON)) (OP)=(O...
答案见上解析 方法一(基底法) 圆心 O到直线ax +by+c=0的距离 C d=(|c|)/(√(a^2+b^2))=1 =1, M N A 如图②, 设 MN的中点为 A,连接OA, 图② 则 OA⊥MN, cos∠MOA=d/(OM)=1/4 (PM)⋅(PN)=((OM)-(OP))⋅((ON)) (OP)=(OM)⋅(ON)-(OP)⋅((OM)+(...
Here, we found that PM2.5 could cause the downregulation of farnesoid X receptor (FXR), a key transcription factor for lipid metabolism. FXR could regulate the accumulation of lipid droplets induced by PM2.5 in vitro. Moreover, FXR/ mice were exposed to PM2.5 for 2 months to investigate ...
🎟️ Tracking https://bitwarden.atlassian.net/browse/PM-15096 📔 Objective Implements xchacha20-poly1305 (https://libsodium.gitbook.io/doc/secret-key_cryptography/aead/chacha20-poly1305/xchacha20-poly...
Nuclear imaging and x-ray results after cementless hip arthroplasty by PM shaft system (in german) : Kühne J-H, Wirth CJ, Refior HJ, et al. (Orthopädische Klinik der Ludwig-MaximilliansUniversität Munchen, Klinikum Grosshadern, Marchionistrasse 15, D-8000 Munchen 70, Germany). RöFo...
答案见上解析 方法一(基底法) 圆心 O到直线ar P +by+c=0的距离 d=(|c|)/(√(a^2+b^2))=1 , M N A 如图②, 设 MN的中点为 图② A,连接OA, 则OA⊥MN, cos∠MOA=d/(OM)=1/4 OM 4 则 (PM)⋅(PN)=((OM)-(OP))⋅((ON)) (OP)=(OM)⋅(ON)-(OP)⋅((...
11.直线ax+by+c=0与圆 O:x^2+y^2=16 相交于M,N两点,若 c^2=a^2+b^2 ,P为圆O上任意一点,则PM ·PN的取值范围为[-6,10] 相关知识点: 试题来源: 解析 答案见上11.[-6,10] 解析:如图 ∵c^2=a^2+b^2 ,∴圆心O 到直线ax+by+c=0的距离 d=(|c|)/(√(a^2+b^2)...
大气细颗粒物 PM2.5 浓度的升高会引起荨麻疹就诊量的增加,且 PM2.5 对就诊量的影响存在滞后性,在20天之内可能仍存在影响。特别当 PM2.5 的指数超过200微克/立方米,这种相关性更加明显。Pro-X 和刘玮医师的这项领先全球的临床发现,不仅震惊学术界,更是非常值得大家关注的重要议题。
This change makes PM state setting functions in SOC level weak so they can be overridden by board/app level. soc: npcx: make pm state setting functions overridable … 8aeba24 TomChang19 marked this pull request as ready for review February 20, 2025 07:51 zephyrbot added the platform...