问题
单项选择题
成人静息状态下,有氧代谢产生CO量最接近()
A.100ml/min
B.130ml/min
C.160ml/min
D.180ml/min
E.200ml/min
答案
参考答案:C
成人静息状态下,有氧代谢产生CO量最接近()
A.100ml/min
B.130ml/min
C.160ml/min
D.180ml/min
E.200ml/min
参考答案:C
假设有如下的关系R和S:
R
A | B | C |
a1 | b1 | 5 |
a1 | b2 | 6 |
a2 | b3 | 8 |
a2 | b4 | 12 |
B | E |
b1 | 3 |
b2 | 7 |
b3 | 10 |
b4 | 2 |
b5 | 2 |
A | R.B | C | S.B | E |
a1 | b1 | 5 | b2 | 7 |
a1 | b1 | 5 | b3 | 10 |
a1 | b2 | 6 | b2 | 7 |
a1 | b2 | 6 | b3 | 10 |
a2 | b3 | 8 | b3 | 10 |