WK-10B型电铲的回转装置包括()和()。
参考答案:回转平台、回转驱动装置
—I have some exciting news to tell you. Our school has been named a model high school.
— That’s really great!
A.Pardon?
B.Has it?
C.Good idea
D.Congratulations!
新生儿窒息时胸外按压的频率为()。
A.60次/分
B.80次/分
C.100次/分
D.120次/分
E.160次/分