【单选题】【消耗次数：1】
有面有关骨骼肌说法错误的是
①
骨骼肌受意识支配
②
骨骼肌细胞核多
③
骨骼肌光镜下可看到明暗相间的条纹
④
骨骼肌细胞核位于细胞中央
参考答案：
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相关题目
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对骨骼肌光镜结构的错误描述是（）
①
胞核多位于肌纤维的周缘分布
②
可看清基质内充满细肌丝和粗肌丝
③
可分辨出肌原纤维的明暗相间的横纹
④
骨骼肌的肌质内充满了肌原纤维
⑤
每个骨骼肌纤维的细胞核可多达几十个甚至上百个
【单选题】
下列关于骨骼肌的描述，错误的是（）
①
肌浆网，即肌纤维内的滑面内质网
②
形成骨骼肌横纹的结构基础是肌原纤维
③
骨骼肌收缩时能与肌球蛋白分子头部结合的是肌动蛋白
④
肌纤维中贮存钙离子的部位是肌浆网
⑤
肌膜在Z线水平向内凹陷形成横小管
【单选题】
关于骨骼肌收缩机制，下述错误的是（）
①
引起兴奋－收缩耦联的离子是Ca<sup>2+</sup>；
②
细肌丝向粗肌丝滑行；
③
Ca<sup>2+</sup> 与横桥结合；
④
横桥与肌纤蛋白结合；
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肌节缩短
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【多选题】
甲向乙发出要约，乙的下列哪些行为不发生承诺的效力（）
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附条件地接受要约
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撤回承诺的通知与承诺同时到达要约人
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撤回承诺的通知因送达的原因后于承诺到达，要约人未及时将该情况通知承诺人
④
承诺被依法撤销
【单选题】
下列有关合伙企业出资不合法的是：（）
①
普通合伙人甲的一辆汽车的使用权
②
普通合伙人乙的专利权没有评估作价，且约定了乙仍然在原有范围内继续使用该专利
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有限合伙人出资的专利权没有评估作价
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普通合伙人李某（犯贪污罪服刑完毕未满1年者）的劳务
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The medical officer was praised (表扬) for _______________ the life of a child.
①
saving
②
checking
③
discussing
④
weeping
【单选题】
Goats are being hired to do the work of people near San Diego. The fires that occurred in Hillborbough four years ago destroyed thirty homes, most of which have been rebuilt. While people were rebuilding the homes, the grasses and bushes were growing back. The area is now so overgrown in bushes that there is again a major danger of fire.The city government put up bids to remove the bushes. The lowest bid they received was $50,000—and that was if the city provided breakfast and lunch for the workers for the six weeks it would take to clear the overgrown area. The city only wanted to give unlimited coffee and a piece of bread a day for each person. When that offer was rejected, the city asked for help on its website.A sheepherder in Montanta and a goat-keeper in San Bernardino read about the city’s plight（困境）while surfing the Web. They both offered to do the job for $25,000. The city government chose the goat-keeper because he lived closer. When he was told that the city dump（垃圾场）was overflowing , the goat-keeper said, “No problem. My goats will eat everything in your dump, except the car engines, of course.” So, for another $5,000, the city killed two birds with one stone. If all goes well, they will invite the goat-keeper and his “family” back every three years. The goat-keeper said that he would probably visit San Diego while his goats were in the dump.Why was the goat-keeper chosen to remove the bushes?
①
Because he offered to do it for the lower price.
②
Because it was easier to transport his goats.
③
Because his goats can do the job better.
④
Because the city wanted to raise more goats.
【单选题】
The president has an ____________ secretary.
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extensive
②
efficient
③
effective
④
expensive