40 80 119 157 193 ()
A.350
B.228
C.240
D.220
参考答案:B
--Ring me at 5 am? No, better not so early! I _________.
---I got it. [ ]
A. will sleep
B. sleep
C. am sleeping
D. will be sleeping
28.2501只取3位有效数字,结果是()。
A.28.2
B.28.25
C.28.3
D.28.30