问题
单项选择题
全口义齿的固位与哪个因素关系最小（）
A.咬合力
B.内聚力
C.附着力
D.表面张力
E.大气压力
答案
参考答案：A
解析：全口义齿能附着在上下颌骨上（即固位）是由于吸附力（包括附着力和内聚力）、表面张力和大气压力等物理作用。咬合力与义齿的稳定有关。
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全口义齿的固位与哪个因素关系最小（）
A.咬合力
B.内聚力
C.附着力
D.表面张力
E.大气压力
参考答案：A
解析：全口义齿能附着在上下颌骨上（即固位）是由于吸附力（包括附着力和内聚力）、表面张力和大气压力等物理作用。咬合力与义齿的稳定有关。
| It may be necessary, in order that .future (51) can enjoy clean air, that more of the (52) is borne by long-term central government fund．As air pollution varies enormously from place to place and can, indeed, be very local, it may also be necessary for the central government to (53) money so that local authorities can (54) special local problems. That these can be significant was shown by the report made in 1970 (55) behalf of the London Boroughs Association. This (56) that in central London since 1958 smoke concentrations have decreased by 80 percent, whereas sunshine has increased by 70 percent and winter visibility has (57) threefold, There have been (58) in mortality and hospital admissions (59) with air pollution and in the response to it of bronchitis, as well as clear if less documented increases in plant types and bird (60) n the cities. |
A．fee
B．tuition
C．cost
D．charge