题目内容
（请给出正确答案）
A.μm
B.nm
C.cm
D.mm
参考答案
简答题官方参考答案
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更多“Particle sizes are typically measured in”相关的问题
A、A. brushes of different sizes
B、B. ink stone
C、C. pigments
D、D. charcoal [ˈtʃɑːkəʊl] pencil
A．The wings of an awl are very smooth.
B．Generally speaking, the female owl is larger than the male one.
C．No owl likes to live in an abandoned nest of other birds.
D．The sizes of owls are not always the same.
A．Because the quality of water decides its volume.
B．Because health conditions affect the amount of water needed.
C．Because there're different sizes of glasses people use.
D．Because there's also water in foods and beverages.
听力原文：M: Good morning, madam. Can I help you？
W: I'd like to see some handbags.
M: Here they are. They are in many sizes and shapes. The black one with flowers is very popular. So is the white one.
W: They do look very nice. I can't make up my mind.
M: Why don't you take both？ I'm sure your friends will like them.
W: That's a good idea. I'll take them both then.
M: Let me wrap them up for you.
W: How much do they cost？
M: Sixty-five yuan in all.
(12)
A．Handbags.
B．Flowers.
C．Black flowers.
D．Both the black and the white flowers.
People describe soil types in all kind of ways such as beavy, light, sandy, clay, loam, poor or good. Soil scientists describe soil types by how much sand, silt and clay is present. This is called texture. It is possible to change the texture by adding different things to the soil. You can roughly estimate the texture of a soil by a simple method called" manual texturing", through determining the feel of a moist sample when robbed between the thumb and forefinger. If the soil sample is predominantly sand, it will feel very gritty, If it is predominantly silt, it will feel smooth or slippery to the touch. And if it's predominant clay, it will feel sticky.
Particle size has a lot to do with a soil's drainage and nutrient holding capacity. Sand is the largest particle and doesn't hold many nutrients. Silt is a soil particle whose size is between sand and clay. When wet, silt feels smooth, but not sticky. Clay is smooth when dry and sticky when wet. Soils high in clay content are called heavy soils. Clay also can hold a lot of nutrients, but doesn't let air and water throuhgh it well. To better understand how big these three soil particles are, think of them like this. If a particle of sand were the size of a basketball, then silt would be the size of a baseball, and clay would be the size of golf ball.
According to the passage, which of the following has NOTHING to do with soil quality？
A．Texture.
B．Width.
C．Depth.
D．Structure.
听力原文：W: Are you being helped, sir？
M: No, not yet. I'm trying to find a pair of shoes. You see, my feet are so big and it's difficult to get my size here.
W: You've come to the right place, sir. Look, we have a variety of styles and different sizes of shoes. May I ask what size do you wear？
M: Oh, 45 or so？ I don't know my exact size in China. Can you measure for me？
What does the man want to buy？
A．A pair of trousers
B．A pair of shoes
C．A coat
D．A dress
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