以下表达式中,正确的是( ) A: K'(MY) = c(MY) / c(M)c(Y) B: K'(MY) = [MY] / [M][Y] C: K(MY) = [MY]/ [M][Y] D: K(MY) = [M][Y]/ [MY]

I'm punctual in my work lfe. But I'm not ___________ in my personal life by American standards.

Hello, I’m David. This is the first time I’m talking to you. First of all, let me tell you something about myself and my family. I’m (1)__________, and I’m a first-year student in a technical (2)__________. There are four people in my family: my dad, my mom, my sister and me. We live in a (3)__________. My dad is tall. He has brown hair and blue eyes. My mom is short. She has (4)__________ and brown eyes. My sister Mary is twelve years old, and she’s in the (5)__________. We love each other and we often go outing together over the weekend.

用EDTA滴定金属离子M时，其滴定突跃范围最大的是 A: Kfθ'(MY)愈大，C(M)愈小 B: Kfθ'(MY)愈大，C(M)愈大 C: Kfθ'(MY)愈小，C(M)愈小 D: Kfθ'(MY)愈小，C(M)愈大

I'm in a really good 1)__________ today. The 2)_________is out and that always brings a 3)_____ to my face. How are you 4)_________today?

I’m not very like 11)______________. Um, they are very similar to each other, but I’m 12)________________ I’m ... they’re more like my mom. I’m more like my dad.

I’m considering ___ my job as I’m not getting on well with my boss. A: changed B: to change C: changing D: to be changed

--- Hello, I’m calling to confirm my room reservation. My name is Jane Smith.---______________________________________.

----What can I do for you ______ my mail while I’m away on a business trip? ----I’m wondering if you ______ my mail while I’m away on a business trip.

酸效应系数正确表达式是( ) A: αy(H)=[MY]/ [ Y] B: αy(H)=[MY ]/[M ] C: αy(H)=[Y´]/[Y] D: αy(Hm)=[M´]/[M] αy(H)=[Y]/[M]