俗称“马牙子”的是
A.缩余釉上皮B.剩余导管上皮C.根鞘上皮D.“马氏”上皮E.牙板上皮剩余
参考答案:E
读一读,选出与画线部分不同类的单词。
1. Can I have some beef, please? [ ]
A. rice
B. vegetables
C. fork
2. I can use chopsticks.[ ]
A. knife
B. spoon
C. strong
3. Look, this is my uncle. [ ]
A. farmer
B. aunt
C. parents
4. My father is a doctor.[ ]
A. baby brother
B. nurse
C. baseball player
5. They're my grandpa and grandma.[ ]
A. father
B. teacher
C. mother
为了保证缆索的初张力和简化安装施工时的张拉设备,维持一定的缆索水平度,防止挠度的产生,一般把缆索的安装长度定为()米。
A、100-200
B、200-300
C、300-400
D、400-500