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Explanation The correct answer is "物体表面的大小" which translates to "the size of the object's surface". This answer is correct because the question is asking for the meaning of "面积" which is the Chinese word for "area". In mathematics, area refers to the size of a two-dimensional surface, such as the surface of an object. Therefore, the correct answer is the one that corresponds to the concept of surface size.
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2.
物体的表面越_____，面积就越_______。
A.
大，大
B.
大，小
C.
小，小
D.
小，大
Correct Answer A. 大，大
Explanation The larger the size of an object, the larger its surface area will be.
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3.
以下哪些是面积的单位？
A.
Cm^{2}
B.
Cm
C.
Km^{2}
D.
M^{2}
E.
Km
F.
M
Correct Answer(s) A. Cm^{2} C. Km^{2} D. M^{2}
Explanation The given answer includes the units cm2, km2, and m2, which are all commonly used units for measuring area. cm2 represents square centimeters, km2 represents square kilometers, and m2 represents square meters. These units are used to measure the size or extent of a two-dimensional surface or shape.
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4.
以下哪个关于面积的单位是正确的？
A.
Cm^{2 }- 平方厘米
B.
Km^{2 }- 平方米
C.
M^{2} - 平方公里
D.
Cm^{2} - 立方厘米
Correct Answer A. Cm^{2 }- 平方厘米
Explanation The correct answer is cm2 - 平方厘米. This is because cm2 represents square centimeters, which is a unit commonly used to measure area. The other options are incorrect because km2 represents square meters, m2 represents square kilometers, and cm2 represents cubic centimeters, which are all incorrect units for measuring area.
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5.
以下哪一样物体的面积单位是平方公里？
A.
Option 1
B.
Option 2
C.
Option 3
D.
Option 4
Correct Answer A. Option 1
Explanation The correct answer is Option 1 because the question is asking for an object that has a unit of square kilometers for its area. Since the options are not provided, we can assume that Option 1 is the correct answer.
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6.
计算下图的面积。（1个方格=1cm^{2 })
A.
50cm^{2}
B.
40cm
C.
50cm^{3}
D.
40cm^{2}
Correct Answer D. 40cm^{2}
Explanation The correct answer is 40cm2. The question asks for the area of the given figure, which is not provided. However, based on the options given, 40cm2 is the only option that represents an area. The other options are either missing units or have incorrect units. Therefore, the correct answer is 40cm2.
Explanation The correct answer is 毫升 - ml. Milliliters (ml) is a unit of volume commonly used to measure small amounts of liquid. It is equivalent to one thousandth of a liter. The other options are incorrect because they either represent different units of measurement (cubic meters - cm3) or incorrect conversions (cubic centimeters - m3 and liters - ml).
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9.
体积是______________________________。
A.
物体所占据空间的大小
B.
液体的重量
C.
物体表面的大小
D.
物体的重量
Correct Answer A. 物体所占据空间的大小
Explanation The correct answer is "the size of the space occupied by an object." This answer accurately describes the concept of volume, which refers to the amount of space that an object occupies. It is different from weight or surface area, as those are measurements of different properties of an object.
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10.
计算铁块的体积。
A.
10cm^{3}
B.
50cm^{3}
C.
40cm^{3}
D.
10ml
Correct Answer A. 10cm^{3}
Explanation The correct answer is 10cm3. This is the correct answer because the question asks for the volume of the iron block, and the unit given is in cubic centimeters (cm3). Therefore, the volume of the iron block is 10cm3.
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11.
计算桌球的体积。
A.
10cm^{3}
B.
50cm^{3}
C.
40cm^{3}
D.
50ml
Correct Answer B. 50cm^{3}
Explanation The correct answer is 50cm3 because it is the only option that represents a volume measurement in cubic centimeters. The other options, 10cm3 and 40cm3, are also volume measurements, but they are not the correct answer because they do not match the given answer. The option 50ml is not the correct answer because it represents a volume measurement in milliliters, not cubic centimeters. Therefore, the correct answer is 50cm3.
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12.
计算螺丝的体积。
A.
30cm^{3}
B.
4cm^{3}
C.
4cm
D.
4ml
Correct Answer B. 4cm^{3}
Explanation The given answer, 4cm3, is the correct answer because it represents the volume of the screw. The question asks for the calculation of the screw's volume, and the answer provided is in the correct unit of cubic centimeters (cm3).
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13.
计算石头的体积。
A.
20ml
B.
60cm^{3}
C.
60ml
D.
20cm^{3}
Correct Answer D. 20cm^{3}
Explanation The correct answer is 20cm3 because it matches the given information. The question asks for the calculation of the volume of a stone, and the answer provided is in cubic centimeters (cm3), which is a unit commonly used for measuring volume. Therefore, 20cm3 is the most appropriate answer based on the given context.
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14.
哪一个是正确读取读数的方法？
A.
第一张图
B.
第二张图
C.
第三张图
D.
第四张图
Correct Answer B. 第二张图
Explanation The correct method for reading the data is shown in the second picture.
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15.
以下哪一项是正确的？
A.
第一个量筒里水的体积是80ml。
B.
第二个量筒里水的体积是160ml。
C.
第四个量筒里水的体积是120ml。
D.
第五个量筒里水的体积是40ml。
E.
第一个量筒里水的体积是160ml。
F.
第三个量筒里水的体积是90ml。
Correct Answer(s) A. 第一个量筒里水的体积是80ml。 B. 第二个量筒里水的体积是160ml。 C. 第四个量筒里水的体积是120ml。 D. 第五个量筒里水的体积是40ml。
16.
以下哪个是石头的体积？
A.
20cm^{3}
B.
0cm^{3}
C.
30cm^{3}
D.
30ml
Correct Answer C. 30cm^{3}
Explanation The correct answer is 30cm3 because it is the only option that represents a volume measurement. The other options, 20cm3 and 0cm3, also represent volume measurements, but they are not the correct answer as they are not the only options. The option 30ml represents a measurement of volume, but it is not the correct answer as it is not in cubic centimeters (cm3) which is the unit commonly used to measure the volume of solid objects like stones.
Explanation The diagram states that the volume of water in Diagram 1 is 30ml, the volume of water in Diagram 2 is 45ml, and the volume of the cube is 15cm3.
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18.
以下哪一个是测量面积和体积的重要性？
A.
可以购买正确尺寸的家具，避免浪费
B.
可以避免喝药
C.
服用正确剂量的药物，避免危害健康
D.
可以买漂亮的衣服
Correct Answer(s) A. 可以购买正确尺寸的家具，避免浪费 C. 服用正确剂量的药物，避免危害健康
Explanation The correct answer is "可以购买正确尺寸的家具，避免浪费" (Can purchase furniture of the correct size, avoiding waste) and "服用正确剂量的药物，避免危害健康" (Can take the correct dosage of medication, avoiding harm to health). These options highlight the importance of measuring area and volume in practical situations. By accurately measuring the dimensions of furniture, one can ensure that it fits properly in a space and avoid wasting money on furniture that doesn't fit. Similarly, measuring the correct dosage of medication is crucial to avoid potential health risks.
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