合成橡胶泛指化学方法合成的橡胶,下列不属于合成橡胶的是()。
A.丁苯橡胶
B.乙丙橡胶
C.氟橡胶
D.烟胶艺
参考答案:D
This is a Chinese boy. His name is Ling Fengyu . His is thirteen he is in No. 52 Middle School. He is in Class One, Grade Eight. Ling Fengyu is in Row Four. He is Number 20. Miss Zhang is his English teacher. They love her very much.
1. Ling Fengyu is a__________ boy.
A. English B. American C. Chinese D. China
2. He is in________ .
A. Row Four B. row 4 C. Row Four D. Four Row
3. _____________ is his English teacher.
A. Miss Zhang B. Mr Zhang
C. Mrs Zhang D. Teacher Zhang
4. He is in________.
A. Class One, Grade 8 B. Class 1, Grade eight
C. Class One, grade eight D. Class One, Grade Eight
5. How old is he? He is _________.
A.30 B.12 C.13 D.11
夜间高处作业和炉膛内作业照明不足,是()违章。
A、习惯性
B、指挥性
C、装置性