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[主观题]

In Experiment 2, the sample solution was neutral at which of the following values for the

volume of titrant added?

A.0.50 mL

B.1.00 mL

C.1.50 mL

D.2.00 mL

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第1题

Based on the results of Study 1, the average monthly wet deposition for Cu2+ over the 12-m

onth period was:

A.less than 50 μg/m2.

B.between 50 μg/m2 and 75 μg/m2.

C.between 75 μg/m2 and 100 μg/m2.

D.greater than 100 μg/m2.

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第2题

In each of the 13 trials, how did the magnitude of the electrical force exerted by Sphere

X on Sphere Y compare to the magnitude of the electrical force exerted by Sphere Y on Sphere X ?

A.The magnitude of the electrical force exerted by Sphere X on Sphere Y was greater than the magnitude of the electrical force exerted by Sphere Y on Sphere X.

B.The magnitude of the electrical force exerted by Sphere X on Sphere Y was less than the magnitude of the electrical force exerted by Sphere Y on Sphere X.

C.The magnitude of the electrical force exerted by Sphere X on Sphere Y was the same as the magnitude of the electrical force exerted by Sphere Y on Sphere X.

D.Cannot be determined from the given information

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第3题

Which of the offspring listed below were collected in Study 1 ? I. Juveniles II. Adults th

at were breeding III. Adults that were not breeding

A.I only

B.III only

C.I and III only

D.I, II, and III

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第4题

A chemist predicted that the volume of 02 reacted would increase at a faster rate if the n

umber of ZABs present in the stack of 3 batteries was increased. Do the results of Trials 1 and 3 support this prediction?

A.Yes, because the final volume was reached sooner in Trial 3 than it was in Trial 1.

B.Yes, because the final volume was reached sooner in Trial 1 than it was in Trial 3.

C.No, because the final volume was reached sooner in Trial 3 than it was in Trial 1.

D.No, because the final volume was reached sooner in Trial 1 than it was in Trial 3.

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第5题

In the 2 studies, the purpose of oven-drying the mixed soil was to remove all the:A.moistu

In the 2 studies, the purpose of oven-drying the mixed soil was to remove all the:

A.moisture.

B.organic matter.

C.soil test N.

D.amino sugar N.

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第6题

According to Student 2, as the force of gravity exerted by Earth on a block increases, wil

l the average speed of the block increase or decrease, and why?

A.Increase, because the weight of the block will increase.

B.Increase, because the weight of the block will decrease.

C.Decrease, because the weight of the block will increase.

D.Decrease, because the weight of the block will decrease.

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第7题

According to Figure 3, 1 yr after emergence, the greatest percent of the seedlings were fr

om which of the tree species in Plot X and Plot Y, respectively?

A.red maple;red maple

B.red maple;white ash

C.white ash;red maple

D.white ash;white ash

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第8题

New fighter jets are being designed so that the wing is modifiable, depending on the spe

ed at which the plane is going. Which

of the following would be a logical adjustment of the wing for such jets?

A.At speeds above 500 mph, the top of the wing would become flatter.

B.At speeds above 500 mph, the top of the wing would become more curved.

C.At speeds above 500 mph, the bottom of the wing would become curved.

D.None of the above

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第9题

Which of the following test pairs reflects consistent experimental data?A.Experiment 1,

Which of the following test pairs reflects consistent experimental data?

A.Experiment 1, wing design 2;Experiment 2, airspeed 200

B.Experiment 1, wing design 1;Experiment 2, wing design 2

C.Experiment 1, wing design 3;Experiment 3, airspeed 400

D.Experiment 1, wing design 1;Experiment 3, airspeed 400

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第10题

Which of the following is loam most likely to contain?A.SandB.ClayC.SiltD.It cannot be d

Which of the following is loam most likely to contain?

A.Sand

B.Clay

C.Silt

D.It cannot be determined from the information given.

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