Brick is thermally efficient building material _____ it is also cheap. A: while B: and C: meanwhile D: but

The minimum hardness in the joint of a FSWed precipitation-hardened aluminum alloys lies in the （ ）. A: thermally affected zone B: thermomechanically affected zone C: dynamically recrystallized zone

Spontaneous Brillouin<br/>scattering is generated through the interaction between the input<br/>light field and the thermally<br/>fluctuating acoustical fields______ .The feature of this effect is that the frequency shift of the<br/>scattering light is dependent on the scattering angle and theacoustic<br/>velocity<br/>______ in<br/>the medium.

What is NOT true about the thermal oxide layer? A: A thermal oxide layer can serve as a passivation layer. B: A thermal oxide layer acts as an insulator and forces the electrons to flow in the emitter. C: It creates a back surface field at the back side of the solar cell and thus it reduces the surface recombination velocity. D: The oxide layer can be thermally grown.