X、Y-、Z+三种微粒的电子层结构相同,则一定不能相等的是 [ ]
A.中子数
B.质量数
C.电子数
D.核电荷数
答案:D
根据首字母提示和句意完成单词。
1. How about l_____ to the radio?
2. Now, let me show you how to l_____ English.
3. Why don't you write d_____ your mistakes?
4. I'm going to meet my p_____ friend this term.
5. Can you give me some a_____? My English is so poor.
6. I enjoy w_____ English films and l_____ to real English songs.
7. The students should speak English all the t_____ in English class.
8. Many students ask for advice about i_____ their English.
9. Did you enjoy y_____ at the party?
10. Write the words on p_____ of paper and place them in your bedroom.
酶法分析优于传统的化学法不包括
A.准确性
B.精密度
C.灵敏度
D.线性范围
E.抗干扰