人体每日摄入膳食纤维的适宜量为()。
A.5~10g
B.10~15g
C.15~20g
D.20~30g
参考答案:D
Tom's mother demanded that she ________ everything on time. [ ]
A. would tell
B. tell
C. have told
D. be told
车站通过能力是车站在现有()条件下,采用合理的(),一昼夜能够接发各方向的()和运行图规定的()。