Which pairs of teeth have a mesial surface touching a mesial surface?
A: 25 and 26
B: 16 and 17
C: 1 and 32
D: 8 and 9
A: 25 and 26
B: 16 and 17
C: 1 and 32
D: 8 and 9
举一反三
- IT can be inferred from the passage that Europa and Antarctica have in common which of the following（） A: Both appear to have a surface with many craters B: Both may have water beneath a thin,hard surface C: Both have an ice can that is melting rapidly D: Both have areas encased by a rocky exterior
- The geoid surface is treated as the surface of mean sea level, which is important for measuring elevations or heights. （ ）
- ______ is covered with heavy snow. A: The surface of earth B: The earth’s surface C: The earths’ surface D: The surface
- _____ is covered with heavy snow. A: The earth’s surface B: The surface of earth C: The surface earth D: The earth surface
- TMS320C54XDSP具有()位的硬件乘法器，连接一个40位的专用加法器。 A: 8×8 B: 17×17 C: 16×16 D: 32×32