He has four son,____ (他们全部都是那个偏僻山村里的高级教师)。

幼儿园保育员应具备()毕业以上学历，并受过()职业培训。

Mrs Zhang often tells us that spring is the time ____ people go sight seeing.

The farm_____my father once worked has taken on a new look for the time being.

As is known to us all,the age_____children can go to school is seven.

兆欧表上有三个接线柱 L、E和 G， 一般测量时只用（）两个接线柱。

悬料的象征：悬料时料尺不动，（）高，顶压低

The speed ____ Tom drives his car is too high.

储存药品应当按照要求采取、（）遮光、（）、防潮、（）、防鼠等措施

试验列车自动制动机，利用口笛向司机表示试验完了时，鸣示（）。