A.一个鸡蛋的质量为50g
B.人正常步行的速度是10m/s
C.人的正常体温是38℃
D.家中电视机的功率是1000W
答案:A
23. Failure as he has been in his previous attempts, he still sticks _________ the research aimed _______ increasing production.
A.in; to
B.out; at
C.on; in
D.with; at
水解速率