问题
单项选择题
测定Cr6+的水样,应在()条件下保存。
A、弱碱性
B、弱酸性
C、中性
D、强碱性
答案
参考答案:A
测定Cr6+的水样,应在()条件下保存。
A、弱碱性
B、弱酸性
C、中性
D、强碱性
参考答案:A
短文填空。(每小题1分,共10分。用方框中的词的正确形式填空,将短文补充完整(注意大小写)。
I’m not 小题1:, I have too many rules in my house, I have to get 小题2: at six o’clock every morning. I can’t meet my 小题3: after school because I have to do 小题4:homework. I can’t watch TV on school nights. And I have to be in bed by ten o’clock. 小题5: weekends, I have to 小题6: my room and wash my clothes. Then I 小题7:to help my mom make 小题8: . Later I have to go to小题9: Children’s Palace to learn piano. I never have any fun. What 小题10: I do ? Zhao Pei |