问题
单项选择题
脂肪的CT值（）
A.0～20Hu
B.30～60Hu
C.-20～-80Hu
D.1000Hu
E.-1000Hu
答案
参考答案：C
解析：CT值等于该物质的衰减系数与水的衰减系数之差，再与水的衰减系数之比后乘以1000。按此公式计算，脂肪的CT值为-20～-80Hu。
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脂肪的CT值（）
A.0～20Hu
B.30～60Hu
C.-20～-80Hu
D.1000Hu
E.-1000Hu
参考答案：C
解析：CT值等于该物质的衰减系数与水的衰减系数之差，再与水的衰减系数之比后乘以1000。按此公式计算，脂肪的CT值为-20～-80Hu。
| 看图，选用方框中的词完成句子。 | |
 1. Is that a _____ ? 2. We don't like _____ . 3. She has _____ for lunch. 4. His father doesn't like _____ . 5. —What's that? —It's an_____ . 6. Bill's sister likes _____ very much. 7. They often have _____ for dinner. 8. Do your parents like _____ ? 9. My brother likes chicken but he doesn't like _____ . 10. The boy likes_____ . |