【单选题】【消耗次数：1】
骨骼肌收缩的原理是：
①
粗、细肌丝之间相互滑行
②
粗肌丝本身缩短
③
粗肌丝向细肌丝内滑行
④
细肌丝本身缩短
⑤
粗、细肌丝同时缩短
参考答案：
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【单选题】
化工制图中图线宽度分粗、中粗、细三种，若粗实线的宽度为d，则细实线的宽度为( )。
①
Normal
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7.8 磅
0
2
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2d
②
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mso-bidi-font-size:11.0pt;
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d
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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{mso-style-name:普通表格;
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mso-tstyle-colband-size:0;
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1/2d
④
Normal
0
7.8 磅
0
2
false
false
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ZH-CN
X-NONE
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mso-para-margin-bottom:.0001pt;
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font-size:10.5pt;
mso-bidi-font-size:11.0pt;
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1/4d
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《“十四五”推进农业农村现代化规划》强调，要深入实施国家粮食安全战略和重要农产品保障战略，落实藏粮于地、藏粮于技，健全辅之以利、辅之以义的保障机制，强化生产、储备、流通产业链供应链建设，构建科学合理、安全高效的重要农产品供给保障体系，夯实农业农村现代化的物质基础。
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【单选题】
寄存人寄存货币、有价证券或者其他贵重物品的，应当向保管人声明，由保管人验收或者封存；寄存人未声明的，该物品毁损、灭失后，保管人可以按照（）予以赔偿。
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一般物品
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