压缩机机构分类?
参考答案:
立式;卧式;角度式;其他形式。
—Wow, your bedroom is clean and tidy.
—Thank you. It _____ every day.
A. clean
B. cleans
C. is cleaned
D. cleaned
保健食品对于人体()的预防或减缓疾病的发生产生作用。
A、健康状态
B、疾病状态
C、第三态
D、第四态