加香机机架由型钢焊制而成,机架上装有()个挡轮和四个托轮。
参考答案:一
用所给动词的适当形式填空
1. Sweet music will enable you to feel _____ (relax) after a day's hard work.
2. What shall I take with me if someone _____ (invite) me to dinner?
3. Often we just walk around the town centre, _____ (see) the beautiful scenery as much as possible.
4. Children usually do something _____ (interest) together on weekends.
5.In modern times, people prefer _____ (be) on time.
关于胸腺瘤不正确的是
A.好发于前上纵隔B.可合并重症肌无力C.多不采取手术治疗D.多为良性E.与自身免疫机制有关