[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 ______ any difference between these two pictures.
A. decisive
B. perceive
C. deceive
D. precise

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

[单项选择]The difference between the two versions of the timeline by NASA is______.


A. 30 seconds
B. 5 minutes and 30 seconds
C. 7 minutes and 30 seconds
D. 3 minutes and 30 seconds

[单项选择]What is the basic difference between the two classes of theories
A. It concerns the place and time of the formation of matter.
B. It is whether the universe will continue to expand or not.
C. It is the current state of the universe.
D. The variations on evolutionary theories cause the difference

[单项选择]I know the difference between these two words. So ______ they.
A. know
B. will
C. do
D. does

[单项选择]What's the difference between the two phases of experiments


A. The two kinds of vaccines were vaccinated together on volunteers in the first phase.
B. The two kinds of vaccines will be vaccinated together on volunteers in the second phase.
C. The combined safety of vaccines had been tested in the first phase.
D. The safety of each vaccine will be tested in the second phase.

[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 conclusion
A. the skill of the scientist
B. the extent to which variables can be controlled
C. the requirements of the observer
D. the development of more accurate instruments