皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【判断题】
在 Geomagic Design X 软件中,布尔运算是指不同实体间的加、减法运算,及合并实体或切割实体。( )
A.
正确
B.
错误
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【单选题】下列对电阻应变片理解错误的是:
A.
电阻应变片由敏感栅、基底、覆盖层和引线等部分组成
B.
敏感栅直径为0.01~0.05mm、高电阻系数的细丝弯曲而成栅状,实际上是一个电阻元件
C.
敏感栅通过粘接剂牢固粘贴在绝缘基底上,两端通过引线引出
D.
电阻应变片只能是金属材质
查看完整题目与答案
【简答题】中国是茶树的原产地，又是最早发现茶叶功效并栽培茶树、制成茶叶的国家。（ ）
查看完整题目与答案
【单选题】Windows的“即插即用”功能是指（）。
A.
对硬件设备有自动识别和配置的能力
B.
对音乐有自动播放的功能
C.
对应用软件有自动打开的功能
D.
具有自动完成任何功能的能力
查看完整题目与答案
【单选题】全科医生的临床专科训练应以:
A.
社区常见健康问题为主
B.
慢性疾病为主
C.
疑难杂症为主
D.
急症重症为主
查看完整题目与答案
【单选题】oracle中查看表结构的命令是哪一个。
A.
select
B.
desc
C.
view
D.
look
查看完整题目与答案
【简答题】就今年发生在泰国的旅游安全事故进行统计分析,找出泰国旅游安全最大的风险是什么,作为旅游从业人员如何安排旅游活动,保证游客的安全,减少游客的损失。
查看完整题目与答案
【单选题】根据我国《船舶升挂国旗管理办法》的规定，有关船舶悬挂中国国旗的说法正确的是（）。 ①船舶应当每日悬挂中国国旗； ②在任何天气情况下中国国旗应当早晨升起傍晚降下； ③船舶按其长度悬挂不同尺度的中国国旗。
A.
①②③
B.
②③
C.
①②
D.
①③
查看完整题目与答案
【单选题】我国计划用8年时间对5·12四川汶川大地震进行灾后重建，重建需要大量钢材和金属合金材料。下列说法正确的是(　　)
A.
铁和钢材的主要化学成分相同，性质也相同
B.
硬铝(Al­Cu­Mg­Mn­Si合金)可用于制造耐高温门窗
C.
黄铜矿(CuFeS 2 )可冶炼出Cu、Fe，同时可制取硫酸
D.
铁矿石是一种可再生资源，没有必要进行开采限制
查看完整题目与答案
【单选题】18-8铬镍不锈钢含
A.
铬8%
B.
镍18%
C.
铬18%
D.
镍18.8%
E.
铬18.8%
查看完整题目与答案
【多选题】How are the glycogen degradative and synthetic pathways coordinated and regulated?
A.
Fasting cells can mobilize glucose that has been stored in the form of glycogen, a branched polymer of glucose . This large polysaccharide is stored as small granules in the cytoplasm of many animal cells, but mainly in liver and muscle cells . The synthesis and degradation of glycogen occur by separate metabolic pathways, which can be rapidly and coordinately regulated to suit an organism’s needs.
B.
When more ATP is needed than can be generated from food-derived molecules available in the bloodstream, cells break down glycogen in a reaction that is catalyzed by the enzyme glycogen phosphorylase. This enzyme produces glucose 1-phosphate, which is then converted to the glucose 6-phosphate that feeds into the glycolytic pathway.
C.
Like glycolysis and gluconeogenesis, the glycogen degradative and synthetic pathways are coordinated by feedback regulation. In this case, enzymes in each pathway are allosterically regulated by glucose 6-phosphate, but in opposite directions: in the synthetic pathway, glycogen synthetase is activated by glucose 6-phosphate, whereas glycogen phosphorylase, which breaks down glycogen, is inhibited by glucose 6-phosphate, as well as by ATP.
D.
This regulation helps to prevent glycogen breakdown when ATP is plentiful and to favor glycogen synthesis when the glucose 6-phosphate concentration is high. The balance between glycogen synthesis and breakdown is further regulated by intracellular signaling pathways that are controlled by the hormones insulin, epinephrine, and glucagon.
查看完整题目与答案
相关题目：
【单选题】下列对电阻应变片理解错误的是:
A.
电阻应变片由敏感栅、基底、覆盖层和引线等部分组成
B.
敏感栅直径为0.01~0.05mm、高电阻系数的细丝弯曲而成栅状,实际上是一个电阻元件
C.
敏感栅通过粘接剂牢固粘贴在绝缘基底上,两端通过引线引出
D.
电阻应变片只能是金属材质
查看完整题目与答案
【简答题】中国是茶树的原产地，又是最早发现茶叶功效并栽培茶树、制成茶叶的国家。（ ）
查看完整题目与答案
【单选题】Windows的“即插即用”功能是指（）。
A.
对硬件设备有自动识别和配置的能力
B.
对音乐有自动播放的功能
C.
对应用软件有自动打开的功能
D.
具有自动完成任何功能的能力
查看完整题目与答案
【单选题】全科医生的临床专科训练应以:
A.
社区常见健康问题为主
B.
慢性疾病为主
C.
疑难杂症为主
D.
急症重症为主
查看完整题目与答案
【单选题】oracle中查看表结构的命令是哪一个。
A.
select
B.
desc
C.
view
D.
look
查看完整题目与答案
【简答题】就今年发生在泰国的旅游安全事故进行统计分析,找出泰国旅游安全最大的风险是什么,作为旅游从业人员如何安排旅游活动,保证游客的安全,减少游客的损失。
查看完整题目与答案
【单选题】根据我国《船舶升挂国旗管理办法》的规定，有关船舶悬挂中国国旗的说法正确的是（）。 ①船舶应当每日悬挂中国国旗； ②在任何天气情况下中国国旗应当早晨升起傍晚降下； ③船舶按其长度悬挂不同尺度的中国国旗。
A.
①②③
B.
②③
C.
①②
D.
①③
查看完整题目与答案
【单选题】我国计划用8年时间对5·12四川汶川大地震进行灾后重建，重建需要大量钢材和金属合金材料。下列说法正确的是(　　)
A.
铁和钢材的主要化学成分相同，性质也相同
B.
硬铝(Al­Cu­Mg­Mn­Si合金)可用于制造耐高温门窗
C.
黄铜矿(CuFeS 2 )可冶炼出Cu、Fe，同时可制取硫酸
D.
铁矿石是一种可再生资源，没有必要进行开采限制
查看完整题目与答案
【单选题】18-8铬镍不锈钢含
A.
铬8%
B.
镍18%
C.
铬18%
D.
镍18.8%
E.
铬18.8%
查看完整题目与答案
【多选题】How are the glycogen degradative and synthetic pathways coordinated and regulated?
A.
Fasting cells can mobilize glucose that has been stored in the form of glycogen, a branched polymer of glucose . This large polysaccharide is stored as small granules in the cytoplasm of many animal cells, but mainly in liver and muscle cells . The synthesis and degradation of glycogen occur by separate metabolic pathways, which can be rapidly and coordinately regulated to suit an organism’s needs.
B.
When more ATP is needed than can be generated from food-derived molecules available in the bloodstream, cells break down glycogen in a reaction that is catalyzed by the enzyme glycogen phosphorylase. This enzyme produces glucose 1-phosphate, which is then converted to the glucose 6-phosphate that feeds into the glycolytic pathway.
C.
Like glycolysis and gluconeogenesis, the glycogen degradative and synthetic pathways are coordinated by feedback regulation. In this case, enzymes in each pathway are allosterically regulated by glucose 6-phosphate, but in opposite directions: in the synthetic pathway, glycogen synthetase is activated by glucose 6-phosphate, whereas glycogen phosphorylase, which breaks down glycogen, is inhibited by glucose 6-phosphate, as well as by ATP.
D.
This regulation helps to prevent glycogen breakdown when ATP is plentiful and to favor glycogen synthesis when the glucose 6-phosphate concentration is high. The balance between glycogen synthesis and breakdown is further regulated by intracellular signaling pathways that are controlled by the hormones insulin, epinephrine, and glucagon.
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题