正确的实验操作是科学探究成功的基础。下列操作中正确的是 [ ]
A.
B.
C.
D.
答案:C
--- He is a very hard-working student.
---________.As far as I know, he often burns the midnight oil.
A.You can say that again
B.Absolutely not
C.Heaven knows
D.No way
46,33,22,15,10,()。
A.1
B.3
C. 5
D.7