问题
单项选择题
在偏光镜下可以观察到的由于晶体脱矿而形成的孔隙，在暗层中所占的比例为（）
A.1％
B.2％～4％
C.5％～25％
D.30％
E.50％
答案
参考答案：B
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在偏光镜下可以观察到的由于晶体脱矿而形成的孔隙，在暗层中所占的比例为（）
A.1％
B.2％～4％
C.5％～25％
D.30％
E.50％
参考答案：B
| 用方框中所给词的适当形式填空。每空一词，有两个多余项。 | |
and 2 .Her father Mr Jones likes Iunning and playing tennis,too. Mr Jones works in a sports club.He is a 3 He can fast（快地）.But now he is a little old.He only helps kids 4 . He works very long hours every day.Sometimes（有时）he works for ten 5 a day. Every moming, Mr Jones 6 at six.Then he bmshes his 7 and washes hisface.Then he eats his breakfast 8 seven. He takes a bus to school. He gets home at about eight in the evening，on weekends,Mr Jones doesn't 9 . He watches Cindy and 10 mother mn and play tennis.Sometimes theV watch TV and go to the movles together.What a happy family! |