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【多选题】
下列关于杂化轨道说法错误的是A.
所有原子轨道都参与杂化
B.
同一原子中能量相近的原子轨道参与杂化
C.
杂化轨道能量集中，有利于牢固成键
D.
杂化轨道中一定有一个电子
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举一反三
【单选题】Through doing this， the teacher will be able to ascertain the extent to __________the children understand what they are reading.
A.
how
B.
which
C.
that
D.
what
【单选题】Don't leave matches or cigarettes on the table within the______of little chil-dren.
A.
hand
B.
reach
C.
space
D.
distance
【简答题】胃特有的运动方式是______，小肠特有的运动方式是______，大肠特有的运动方式是______。
【判断题】城市综合交通资源应优先向集约、绿色交通配置。城市交通中由集约型公共交通 与步行、自行车交通承担的出行比例,城市集中建设区内规划城市人口规模 100 万及以上的 城市不应低于 75%,其他城市不宜低于 80%。
A.
正确
B.
错误
【单选题】The second paragraph mainly tells us that ______
A.
parents should be strict with their children
B.
parental controls reflect only the needs of the parents and the values of the community
C.
parental restrictions vary, and are not always enforced for the benefit of the children alone
D.
parents vary in their strictness towards their children according to the situation
【单选题】Bright children and not-bright children__________.
A.
are two different types of children
B.
are different mainly in their degree of cleverness
C.
have difference only in their way of thinking
D.
have different knowledge about the world
【简答题】小肠特有的运动形式是
【单选题】¿Qué se cree la flor de cempasúchil?
A.
La comida favorita de los muertos.
B.
La flora favorita de los muertos.
C.
El guía de los muertos.
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