相对误差是指
A.随机误差或不可定误差
B.由于仪器陈旧使结果严重偏离预期值
C.误差在测量值中所占的比例
D.测量值与平均值之差
E.测量值与真值之差
参考答案:C
There are over 58,000 rocky objects in ______ space, about 900 of which could fall down onto ______ earth.
A.the; the
B./; the
C.the; a
D.a; /
甲状腺相关性眼病包括()
A.上睑退缩
B.回落延迟
C.睑闭不全
D.眼外肌肥大
E.复视