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【单选题】
The case of Daimler-Chrysler is employed in the text as______.A.
an illustration of an evaluation criterion
B.
an explanation of a spectacular failure
C.
a discussion of a mobile operator
D.
a guarantee of a harsh judgement
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【单选题】What does the fight against terrorism involve, apart from the use of force in certain instances? ( )
A.
intelligence gathering
B.
financial sanctions
C.
judicial cooperation
D.
all above
【单选题】It took 1.5 seconds for the bicycle to move from A to B. What was the net force acting on the system during this time interval?
A.
N
B.
N
C.
N
D.
N
【简答题】What is the importance of the water potential concept in plant physiology? What are the components of water potential? 2. Define and give an example of osmosis in a plant cell. What is the driving for...
【单选题】Two blocks are at rest on a horizontal frictionless surface with a compressed spring between them. The 10-kg block accelerates when the string holding the system in compression is cut and the 20-kg bo...
A.
40 N
B.
160 N
C.
(160/3) N
D.
80 N
E.
50 N
F.
60 N
G.
100 N
【简答题】What can be inferred from the passage? The insects need not fear the force of gravity because they are so ______ in weight.
【单选题】An atomic nucleus has a charge of +40e. An electron is m from the nucleus. What is the force on the electron?
A.
2.9 nN
B.
3.7 nN
C.
6.8 nN
D.
9.2 nN
【单选题】A 1200-kg car starts from rest and accelerates with constant acceleration,traveling 200 m in 9.00 s. What is the force of the road on the car during this acceleration?
A.
1.43 kN
B.
3.87 kN
C.
5.93 kN
D.
11.8 kN
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