Some townspeople visit Emily a few years after her father’s death to complain about what?(5.0)
A. Her refusal to marry
B. Her home’s shabbiness
C. Loud parties
D. A mysterious smell
下列哪种矿物具有双折射率?
A. 橄榄石
B. 萤石
C. 石榴子石
D. 蛋白石
下列哪种矿物属于均质体?
A. 金红石
B. 普通角闪石
C. 斜长石
D. 尖晶石
以下哪种说法正确?
A. 光由光密介质射入光疏介质,一定发生全反射
B. 自然光射入非均质体中一定发生双折射
C. 高级晶族晶体为一轴晶
D. 低级晶族晶体为二轴晶