红、蓝宝石的双折射率为0.094~1.007。
参考答案:错
将句子的序号写在对应的图片下。
( ) ( ) ( ) ( ) ( )
a. I like to play on the computer.
b. I like to play with my doll and my skipping rope.
c. She likes to sing songs.
d. She likes to draw pictures.
e. Jenny likes to play basketball with her father and brother.
四肢长度应采用正确测量方法。
测量上臂长度的起止点是()
A.从肩峰至肱骨内髁
B.从肩峰至中指尖
C.从肩峰至肱骨外上髁
D.从肩峰至桡骨茎突尖
E.从肩峰至尺骨茎突尖