在扫描过程中，被扫部位随意和不随意的运动，可产生哪种伪影（）
A.移动条纹伪影
B.帽状伪影
C.杯状伪影
D.环状伪影
E.以上都可以
参考答案：A
— Will you join us in the dance tonight?
— I'm afraid not. My uncle is coming by train at 7 p.m. and I _____ him at the station then. [ ]
A. will meet
B. am about to meet
C. will be meeting
D. meet
力的三要素指的是力的______、______和______．
