题目内容

气流与纬纱速度的理想配合:速度尽量接近速度,但又不能超过速度,这样既能保证纬纱以高速飞行,缩短纬纱的飞行时间,又能保证纬纱挺直。

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喷气引纬的主喷嘴由、 和组成,

关于主喷嘴的安装有两种,第一种是主喷嘴固定安装在机架上,不随筘座一起前后摆动,可称为。主喷嘴固装在筘座上,随筘座一起前后摆动,它可以保证喷嘴与筘槽或管道片始终对准,可称为。通常,我们常常采用的是。

--I put my purse on the table just now, have you seen it?No. I haven’t. You should never put __________ on the desk anyway.

A. anything important
B. important anything
C. something important
D. important something

--How was your final exam?The English and Maths papers weren’t __________ for me. I hope I haven’t failed.

A. easy enough
B. difficult enough
C. enough easy
D. enough difficult

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