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【单选题】
汽车及零部件主要是金属材料制成的，在加工和使用过程中都会受到外力的作用，这种外力通常称为( )。A.
载荷
B.
力
C.
力矩
D.
合力
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反馈参考答案：
举一反三
【多选题】结晶态、非极性线形高分子具有如下溶解特点：
A.
大部分高分子链处于规整排列的状态，结合力强，在室温下链段运动难以进行
B.
将高分子与溶剂加热到高分子的熔点附近，有利于溶解
C.
HDPE在四氢萘中，需要加热到120℃左右才能很好溶解
D.
全同立构或间同立构聚丙烯在十氢萘中要加热到130℃左右才能很好溶解
E.
加热的本质是使得高分子呈现非晶态，链段运动变得容易
【简答题】下列关于传入侧支性抑制的描述,正确的是
【简答题】What should be included in the official transcripts in addition to prior graduate study? Prior __________ .
【单选题】23 In addition to protection, tariffs serve to ________.
A.
generate revenue
B.
subsidize exports
C.
subsidize imports
D.
increase consumption
【简答题】设点电荷Q1=25nC位于(4,-2,7),电荷Q2=60nC位于P2(- 3,4,-2)。 (a)求P(1,2.3)处的电场强度E。 (b)在y轴上哪个点Ex=0?
【单选题】The author of the passage quotes the White officer in lines 23-24 primarily in order to provide evidence to support the contention that______
A.
virtually all White officers initially had hostile attitudes toward Black soldiers
B.
Black soldiers were often forced to defend themselves from physical attacks initiated by soldiers from White units
C.
the combat performance of Black units changed the attitudes of White soldiers toward Black soldiers
D.
White units paid especially careful attention to the performance of Black units in battle
E.
respect in the army as a whole was accorded only to those units, whether Black or White, that performed well in battle
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