捆绑设备的绳索位置不要太高，为避免搬运高大设备时摇摆和倾倒，可适当增加（）根拖拉绳来

直肠癌一般先向肠管周围及向肠壁深层浸润生长，向肠壁纵轴浸润发生较晚，浸润距离一般不超过癌肿边缘的（）

A.1～2cm

B.2～3cm

C.4～5cm

D.5～6cm

E.6cm以上

通用于一般商品的。EAN-13标准码由______位数字组成。

A．8

B．10

C．13

D．不超过15

用所给单词的适当形式完成句子.

1. My father spent two hours        _ (cover) the vegetables last night.

2. To our surprise, the little boy can write all the words        _ (correct).

3. I think this dictionary is very        _ (help) to you if you want to learn English.

4. Look! Your house _         (burn).  Let's go and put it out quickly.

5. I feel very        _ (pain) all over my head.  What's wrong with me?

何谓基础代谢率？测定时应注意哪些事项？

龙泉窑