| 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 zone, and finally the core. The first three zones are regarded as the Sun’s atmosphere. But since the Sun has no solid surface, it is hard to tell where the atmosphere ends A. photosphere B. corona C. chromosphere D. convection zone [判断题] 两构件间凡直接接触,而又相互联接的都叫运动副。( )
A.正确 B.错误 [单项选择]喼汁的味型特征是______。
A. 香甜味型 B. 酸甜味型 C. 酸香味型 D. 麻辣味型 [单选题]0.2～0.5μg/ml氯用于
[单选题] 根据国家赔偿法规定， 侵犯公民生命健康权， 造成身体伤害的， 应当因误工减少的收入的， 减少的收入每日的赔偿金按照国家上年度职工日平均工资计算， 最高额为国家上年度职工年平均工资的多少倍？
A.5 B.10 C.15 D.20 [多项选择]关税与贸易总协定和世界贸易组织的基本原则是（）
A. 自由贸易和公平竞争原则 B. 非歧视原则 C. 一般地取消数量限制原则 D. 对发展中国家实施差别待遇原则 [判断题]C1类施工因故需延长作业时间时，施工负责人于批准的作业结束时间前30分钟，向请点站（含车站、OCC）申请延点，请点站同意后方可延长，延长作业时间原则上不超过60分钟，且不得影响运营服务。
A.正确 B.错误 [单项选择]
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