动物细胞膜所含的糖脂主要是()
A.甘油磷脂
B.胆固醇
C.鞘磷脂
D.鞘糖脂
E.糖蛋白
参考答案:D
As your teacher,I could not have you______away with cheating in the exam.
A.get
B.getting
C.breaking
D.break
二次文献期刊是在()文献基础上,经过整理加工,按一定顺序编成的书、索引等检索性的刊物。