This document contains 4 parts that provide exercises on English phonetic and grammar concepts. Part 1 focuses on pronunciation exercises identifying words with different pronunciations of underlined parts. Part 2 covers stress exercises identifying words with different stress patterns. Part 3 provides verb tense exercises choosing the correct verb form to complete sentences. Part 4 contains additional grammar exercises on topics like verb tenses. The document serves as a learning tool with multiple exercises testing understanding of English pronunciation and grammar rules.
8. II. T鱈nh ch畉t v畉t l鱈
Ion l動畛ng c畛c
Ch畉t r畉n
D畛 tan
Nhi畛t 畛 n坦ng
ch畉y cao
Tinh th畛
kh担ng mu
V畛 ng畛t
V狸 t畛n t畉i 畛 d畉ng ion l動畛ng c畛c n棚n amino axit c坦
nh畛ng t鱈nh ch畉t no sau 但y? 叩nh d畉u vo 担 炭ng
Ch畉t l畛ng Ch畉t r畉n
Nhi畛t 畛 n坦ng ch畉y cao Nhi畛t 畛 n坦ng ch畉y th畉p
Kh坦 tan trong n動畛c D畛 tan trong n動畛c
9. 1. T鱈nh ch畉t axit-baz董 c畛a dung d畛ch amino axit
?? Quan s叩t th鱈 nghi畛m sau, v r炭t ra nh畉n x辿t
III. T鱈nh ch畉t h坦a h畛c
N畉u a=b : Trung t鱈nh, pH = 7
N畉u a>b : Axit, pH < 7
N畉u a<b : Baz董, pH > 7
Phi畉u h畛c t畉p 2: Cho 6 畛ng nghi畛m ch畛a c叩c
dung d畛ch sau: Glyxin, Metylamin, Alanin, Anilin,
axit acetic, phenylamoni clorua. Mu qu畛 s畉 thay
畛i th畉 no khi cho vo c叩c 畛ng nghi畛m tr棚n ?
18. A. Amino axit l h畛p ch畉t h畛u c董 a ch畛c m
trong ph但n t畛 v畛a c坦 nh坦m NH2 v -COOH
C畛ng c畛
C但u 1. Ph叩t bi畛u no sau 但y kh担ng 炭ng
B. -amino axit c坦 nh坦m NH2 v -COOH c湛ng
li棚n k畉t v畛i m畛t nguy棚n t畛 cacbon no
C. C叩c amino axit t畛n t畉i 畛 d畉ng ion l動畛ng c畛c
D. Trong i畛u ki畛n th動畛ng, c叩c amino axit l
nh畛ng ch畉t r畉n kh担ng mu, d畛 tan trong n動畛c v
c坦 v畛 ng畛t