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【简答题】
v. 获得,取得
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举一反三
【单选题】I had to work hard to t he other students.
A.
keep away from
B.
keep up with
C.
keep back
D.
keep out
【简答题】可用于直接配制标准溶液的是A. K2Cr2O7(A.R.) B. KMnO4(A.R) C. Na2S2O3·5H2O(A.R) D. NaOH(A.R)
【简答题】Complete the sentences with words or the expression from these words. assignment concentrate dormitory enrolled grades productive schedule semester skip due date 1. I c...
【简答题】语法专练( 2 月 25 日讲解 ) 1. Paul doesn ’ t have to be made ____. He always works hard. A. learn B. to learn C. learned D. learning 2. The boy wanted to ride his bicycle in the street,...
【单选题】可用于直接配制标准溶液的是 ( )
A.
FeSO 4 (R)
B.
K 2 Cr 2 O 7 (R.)
C.
Na 2 S 2 O 3 •5H 2 O(R)
D.
NaOH (R)
【简答题】可用于直接配制标准溶液的是A. KMnO4(A.R) ； B. K2Cr2O7(A.R.) ； C. Na2S2O3 • 5H2O(A.R) D. NaOH(A.R) 。
【简答题】Correct the mistakes in the following sentences. 1. Some North American food is very good, but I don’t like most of them. 2. When we were schoolgirls, my sister and me used to play badminton after sch...
【单选题】可用于直接配制标准溶液的是
A.
KMnO 4 (R)
B.
K 2 Cr 2 O 7 (R.)
C.
Na 2 S 2 O 3 .5H 2 O (R)
D.
NaOH (R)
【简答题】3 语法专练( 2 月 25 日讲解 ) 1. Paul doesn ’ t have to be made ____. He always works hard. A. learn B. to learn C. learned D. learning 2. The boy wanted to ride his bicycle in the street, but his mot...
【简答题】HLB值是指( ),一般按HLB值选择乳化剂,HLB值为( )用于W/O型体系中,HLB值为( )用于O/W型体系。
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