问题
单项选择题
在非致癌物的危险度评定中，代替NOAEL（或LOAEL）来推导RfD的参数是（）
A．生物有效剂量
B．基准剂量
C．参考剂量
D．实际安全剂量
E．阈剂量
答案
参考答案：B
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在非致癌物的危险度评定中，代替NOAEL（或LOAEL）来推导RfD的参数是（）
A．生物有效剂量
B．基准剂量
C．参考剂量
D．实际安全剂量
E．阈剂量
参考答案：B
| 阅读理解。 |
 |
| 1. Where is Anne's birthday party going to be held? |
[ ] |
| A. In Room 20. B. At 107 Pine Avenue. C. At 3 The Avenue. D. At Jane's place. |
| 2. Who will meet at 1 p.m.? |
[ ] |
| A. Those who will plan Fran's birthday party. B. Those who will play football on Saturday. C. Those who need a lift. D. Those who will celebrate Anne's birthday. |
| 3. Fran's birthday is _______. |
[ ] |
| A. on Friday B. on Thursday C. on Wednesday D. on 7th October |