She gained ten pounds in the past few weeks. So this dress needs to be __________ .
A. fix
B. fixed
C. alter
D. altered
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There was still a long way to go. __________ , some progress had been made.Which of the following words cannot be used in the sentence.
A. Yet
B. Nonetheless
C. Nevertheless
Despite
We have __________ this house and would hate to move.
A. been attach to
B. been attached
C. got attached to
D. got attached
从力学、制造和耗材等方面分析标准椭圆形封头、碟形封头、半球形封头优缺点?
直流电动机的转子又称为电枢,主要是由( )等组成。
A. 电枢铁芯
B. 绕组
C. 换向器
D. 电阻器