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【单选题】
小儿腹泻3天,中度脱水,伴中度酸中毒,血钠含量是122mmol/L,此患儿补充累积丢失量首选的液体是:胎龄 39出生,出生体重2800g,身长 50cm,皮肤红润,胎毛少,足底纹理较多。该婴儿最可能是:( )A.
早产儿
B.
足月儿
C.
足月小样儿
D.
过期产儿
E.
大于胎龄儿
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举一反三
【单选题】Reaction 1 has a D G ° of –12.3 kJ/mol, and Reaction 2 has a D G ° of 23.4 kJ/mol. Which statement is TRUE of these two reactions?
A.
Reaction 1 occurs faster.
B.
Reaction 2 occurs faster.
C.
Both reactions occur at the same rate.
D.
Reaction 2 will not occur.
E.
It is impossible to know which reaction occurs faster with this information.
【简答题】光反应(1ight reaction)
【单选题】What is the product of the reaction between HBr and 1-pentene?
A.
1-bromopentane
B.
2-bromopentane
C.
3-bromopentane
D.
2-bromopentene
【单选题】Whatis the writer’s reaction in para 1?
A.
sentence 1
B.
sentence 2
C.
sentence 3
D.
sentence 3&4
【单选题】H1N1 control and prevention is a to China as well as the whole world．
A.
surprise
B.
challenge
C.
reaction
D.
threat
【简答题】在用反胶团萃取技术分离蛋白质的研究中,使用得最多的表面活性剂是( )。
【简答题】A certain reaction, A+B → C, is first order with respect to each reactant, with k = 5.0 × 10 -3 M -1 s -1 . Calculate the concentration of A remaining after 100 s if the initial concentration of A was...
【单选题】【图片】The enthalpy change offor mation for the above reaction in kJmol-1 is:
A.
-150 kJ mol -1
B.
+150 kJ mol -1
C.
+15 kJ mol -1
D.
- 15 kJ mol -1
【单选题】The activation energy of a reaction is 114kJ × mol -1 , if it is half of the value when a catalyst is added, the reaction rate will increase by
A.
1 ´ 10 2
B.
1 ´ 10 10
C.
1 ´ 10 8
D.
1 ´ 10 6
E.
1 ´ 10 12
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