问题
单项选择题
比色分析法对于()组分测定更适宜。
A.常量
B.痕量
C.微量
答案
参考答案:C
比色分析法对于()组分测定更适宜。
A.常量
B.痕量
C.微量
参考答案:C
选词填空。 | |
2. _____ the blackboard, boys and girls. 3. _____! The car is coming. 4. The boy _____ his mother very much. 5. The woman _____ her baby carefully. 6. Where is my pen? Can you help me _____ it? |