【单选题】The teacher spoke loudly in class so as to make herself ______clearly.
【单选题】在页式存储管理方案中,进行主存分配的单位是( )
【单选题】The inexperienced teacher spoke with______ of nervousness.
【单选题】Three people spoke at the meeting.____was a doctor; ____was a student; ___was a teacher.
B.
The first; the other; the rest
C.
One; another; the third
【单选题】The teacher spoke highly of such ______ as loyalty, courage and truthfulness shown by his students.
【简答题】A、B、C、D、E是位于短周期的主族元素,其中A、B为金属元素。已知: ①热稳定性:H m D>H m C; ②C m- 、E (m-1)- 具有相同的电子层结构; ③B与E在同一周期,在该周期中,E的原子半径最小,B的离子半径最小; ④A、B所形成的单核离子具有相同的电子层结构,B的最高价氧化物对应的水化物与A、E的最高价氧化物对应的水化物都能反应。 依据上述信息回答下列问题: (1)H m D...
【单选题】The teacher spoke very slowly ____the students could understand everything he was saying.
【简答题】A、B、C、D、E都是元素周期表中前20号元素,其原子序数依次增大。B、C、D同周期,A、D同主族,E和其它元素既不在同周期也不在同主族。B、C、D的最高价氧化物的水化物均能互相反应生成盐和水。A和E可形成离子化合物,其晶胞结构如下图所示 (1)A和E所形成的化合物的电子式是______________ (2)A、B、C、D四种元素的原子半径由小到大的顺序为_____________(用元素符号表...