The temperature of the Sun is over
5,000 degrees Fahrenheit at the surface, but it rises to perhaps more than 16
million degrees at the center. The Sun is so much hotter than the Earth that
matter can exist only as a gas, except at the core. In the core of the Sun, the
pressures are so great against the gases that, despite the high temperature,
there may be a small solid core. However, no one really knows, since the center
of the Sun can never be directly observed. Solar astronomers do know that the
Sun is divided into five layers or zones. Starting at the outside and going down
into the Sun, the zones are the corona, chromosphere, photosphere, convection
zones, and finally the core. The first three zones are regarded as the Sun’ s
atmosphere. But since [多选题] 鉴别波形间断角的差动保护,不是根据变压器( )波形特点为原理的保护。
A. 外部短路电流 B. 负荷电流 C. 励磁涌流 [单选题]不得在架空电力线路导线()300米区域内放风筝。
A.大号侧 B.小号侧 C.两侧 D.下侧 [单选题]王某系某环境影响评价机构的工程师,其在为甲经营的化工厂进行环境影响评价时,收受甲的红包,将评价文件进行修改,与事实不符,造成化工厂排放有毒废物严重污染环境的后果。王某构成()。
A.非国家工作人员受贿罪 B.污染环境罪 C.出具证明文件重大失实罪 D.包庇罪 [多选题]电能质量的两个基本指标是( )和( )。
A.电压 B.电量 C.频率 D.电功率 [多选题]地面作战时,分水器阵地应设置在火势蔓延方向的( ),存在辐射、浓烟、倒塌等安全风险时应保持足够的安全距离。
A.下风 B.侧上风 C.上风 D.侧下风 [单选题]《劳动者职业健康监护及其档案管理制度》规定,发生职业急性中毒事件或其它职业性损伤情况时,可根据诊断与治疗需要,随时由( )安排职业性体检与治疗。
A.安环部 B.设备部 C.人事部 D.办公室 [单项选择]
Short of money Need an instant loan Since the early 1990s your best bet has been to go to the low-rent end of town and find an appointed loan-shop. There you can borrow money in small amounts, generally not much more than $500, against your post-dated pay-cheque. You will be charged around $15 interest for every $100 you borrow--and that is per month. [单选题]参战车辆停靠( ),车头朝向撤离方向,严禁停靠在地势低洼处和窨井盖、下水道附近,并与现场必须保持足够的安全距离,不得贸然进入储罐区。
A.上风方向 B.下风方向 C.侧上风方向 D.上风或侧上风方向 [填空题]食醋酿造主要微生物()、酵母菌、醋酸菌。
[单项选择]除哪项外,均为仙鹤草的功效()
A. 收敛止血 B. 截疟 C. 消积 D. 止痢 E. 补虚 [单项选择]变压器铭牌上的额定容量是指()。
A. 有功功率 B. 无功功率 C. 视在功率 D. 平均功率 [单选题] 抽提塔在一定压力下操作,可以避免抽提塔内发生( )。
A.固化 B.液化 C.凝结 D.汽化 [单项选择]全口义齿基托需缓冲的区域是()
A. 上颌前后颤动线之间 B. 上颌牙槽嵴 C. 远中颊角区 D. 下颌牙槽嵴 E. 下颌舌骨嵴 我来回答: 提交
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