缝纫机不吃料主要是送料牙()不够或压脚(),应调整送料牙()调整压脚()程度。
参考答案:高度;太松;高度或更新送料牙;松紧
She has expressed her hope ______ the foreign students will spread the good will and sincerity of the Chinese people to other parts of the world.
A.that
B.which
C.whether
D.what
在现实生活中有时我们会发现,狗会“收养”流浪猫,并且能很好相处,这说明了()
A、依恋
B、合作
C、互助
D、团结