我们把力的(),(),和()称为力的三要素。
参考答案:大小、方向、作用点
最常见的乳腺癌是()
A.髓样癌
B.单纯癌
C.黏液癌
D.浸润性导管癌
E.佩吉特病
This dictionary, a few pages __________ are missing, is of no use.
A.to which
B.in which
C.of which
D.among which