[单项选择]It can be concluded that the difference between complete proteins, partially complete proteins and incomplete proteins lies in________.
A. the amount of essential amino acids
B. the types of essential amino acids
C. the amount of lysine
D. the combinations of amino acids

[单项选择]We can tell the difference between a glacier and a mere mass of ice by ________.
A. the thickness of the ice
B. the movement of the ice
C. the weight of the ice
D. the amount of ice

[单项选择]Can you ______ the difference between these two types
A. answer
B. say
C. talk
D. tell

[单项选择]I can hardly ______ the difference between these two words.
A. point
B. speak
C. talk
D. tell

[单项选择]I can't ______ any difference between these two pictures.
A. decisive
B. perceive
C. deceive
D. precise

[单项选择]I can't tell the ______ difference between the twin sisters.
A. slight
B. simple
C. slender
D. single

[单项选择]I can' t tell the ______ difference between the twin sisters.
A. slight
B. simple
C. slender
D. single

[单项选择]I can't _________ any difference between these two pictures.
A. decisive
B. perceive
C. deceive
D. precise

[单项选择]The main difference between natural and artificial selection is that human beings______.


A. control the direction of artificial selection
B. control the direction of natural selection
C. make new genes in artificial selection
D. make new genes in natural selection

[单项选择]The author explains the difference between popular and learned words ______.


A. by contrast
B. by giving details
C. by a lot of examples
D. by making deductions

[单项选择]One difference between a constitutional monarch and the president not mentioned by the author is that the______.
A. monarch is non-elective
B. monarch has unlimited tenure
C. president has a limited veto
D. president is limited by the constitution

[单项选择]The most striking phonetic difference between American and British English is the pronunciation of _______ in words.
A. r
B. a
C. wh
D. er

[单项选择]What is the fundamental difference between conflict and functional theorists
A. Conceptions of political institution.
B. Conceptions of political power.
C. Functions of the ruling class.
D. Functions of the concentration of power.

[单项选择]

Passage Two The difference between biological and physical science is not that one is inexact, the other exact, but in degree of exactness, this being related to the number of variables which must be dealt with simultaneously and the extent to which they can be controlled. In general, the biological sciences must deal with larger errors than the physical sciences; but this is not uniformly true, as the student will realize when he considers the accuracy of meteorological prediction or if he comprehends the meaning of the fact that the structural engineer considers it necessary very often to use a safety factor of two or three hundred per cent. The statistical principles of dealing with error of measurement, or in prediction and generalization, are the same whether the errors are large or small. Statistics is not a means of confusing issues that would otherwise be clear, nor a substitute for obtaining clear answers, but a means of checking and controlling conclusions by pro
A. They get rid of intuition,
B. They make it more logical.
C. They reduce everything to numbers.
D. They give an idea of the amount of error involved.