电动机是将电能转化成机械能的机器，但由于线圈内部有电阻，所以同时还有一部分电能转

根据短文内容和所给的首字母提示，在空格内填写适当的单词,使短文通顺。

     This is a shopping mall. It is new and big. There are five f ________(1) in this shopping mall. You

can buy m ________(2) things here. You can buy food and d ________ (3). You can buy fruit and

v ________ (4).  You can buy some stationery like pens,  pencils,  writing paper,   rulers and so on.

There are many c ________(5) shops for girls and a computer game c ________(6) for boys. But I

don't like it because it is small and there are too m ________ (7) people in it. While I am p ______

(8) a game. there are always lots of people w ________ (9) for me to finish.   So I always go to the

cinema and s ________ (10) a film.

某商场有四类食品，其中粮食类、植物油类、动物性食品类及果蔬类分别有40种、10种、30种、20种，从中抽取一个容量为20的样本进行食品安全检测．若采用分层抽样的方法抽取样本，则抽取的植物油类与果蔬类食品种数之和是______．

漆皮()

钢尺量距时，当距离超过一尺段时，宜丈量两次，其较差应小于( )cm。

A．1
B．2
C．3
D．4

分段试压