Solidification of Eutectics - Solidify at a constant temperature, Planar solidification front, Lamellar crystals
Solidification of Eutectics - Solidify at a constant temperature, Planar solidification front, Lamellar crystals
The chemical bond that causes silicon atoms to combine into crystals is called an ioninc bond
The chemical bond that causes silicon atoms to combine into crystals is called an ioninc bond
Solidification of Alloys: Solidify over a range of temperature, Mushy zone, Columnar dendrites crystals
Solidification of Alloys: Solidify over a range of temperature, Mushy zone, Columnar dendrites crystals
In the crystals of the following substances, the substance with ionic bonds is ( ). A: SO2 B: SiO2 C: NaCl D: H2O
In the crystals of the following substances, the substance with ionic bonds is ( ). A: SO2 B: SiO2 C: NaCl D: H2O
Would you expect all the crystals in an intrusive igneous rock to be the same size? A: Yes, you would. B: No, you wouldn't.
Would you expect all the crystals in an intrusive igneous rock to be the same size? A: Yes, you would. B: No, you wouldn't.
These clouds will contain drops of water at temperature above freezing, or ice crystals at temperatures below freezing. A: coldness B: zero C: average D: ice
These clouds will contain drops of water at temperature above freezing, or ice crystals at temperatures below freezing. A: coldness B: zero C: average D: ice
Crystals which are mainly formed by ionic bonding: A: high melting point B: poor plasticity C: low hardness D: solid conductive E: liquid non-conductive
Crystals which are mainly formed by ionic bonding: A: high melting point B: poor plasticity C: low hardness D: solid conductive E: liquid non-conductive
What's right about the general properties of crystal? A: If there are anions in a crystal, there must be cations B: If there are anions in a crystal, there must be cations C: There are not necessarily chemical bonds in molecular crystals D: There must be no covalent bond in the ionic crystal
What's right about the general properties of crystal? A: If there are anions in a crystal, there must be cations B: If there are anions in a crystal, there must be cations C: There are not necessarily chemical bonds in molecular crystals D: There must be no covalent bond in the ionic crystal
Which of the following statements are TRUE about patients with gout？ A: Male blood uric acid> 420 μg/L, female blood uric acid > 350 μg/L B: Tophi are found C: Sodium urate crystals are found in the joint fluid or sodium urate deposition is found in the tissue D: There are more than two typical attacks (sudden onset, severe pain in the night and relief during the day, limited to the distal end of the lower limbs) and treated with colchicine, relief within 2 days
Which of the following statements are TRUE about patients with gout？ A: Male blood uric acid> 420 μg/L, female blood uric acid > 350 μg/L B: Tophi are found C: Sodium urate crystals are found in the joint fluid or sodium urate deposition is found in the tissue D: There are more than two typical attacks (sudden onset, severe pain in the night and relief during the day, limited to the distal end of the lower limbs) and treated with colchicine, relief within 2 days
Which of the following statements are TRUE about patients with gout？ A: Male blood uric acid> 420 μg/L, female blood uric acid > 350 μg/L B: Tophi are found C: Sodium urate crystals are found in the joint fluid or sodium urate deposition is found in the tissue D: There are more than two typical attacks (sudden onset, severe pain in the night and relief during the day, limited to the distal end of the lower limbs) and treated with colchicine, relief within 2 days
Which of the following statements are TRUE about patients with gout？ A: Male blood uric acid> 420 μg/L, female blood uric acid > 350 μg/L B: Tophi are found C: Sodium urate crystals are found in the joint fluid or sodium urate deposition is found in the tissue D: There are more than two typical attacks (sudden onset, severe pain in the night and relief during the day, limited to the distal end of the lower limbs) and treated with colchicine, relief within 2 days