随着注射速度的增加，制品的内应力增加。
参考答案：对
A．时刻t线圈中电流的瞬时值icosωt
B．线圈中电流的有效值I
C．线圈中电流的有效值I=
D．线圈消耗的电功率P
By the time he was dying, he made a testament that he would______his kidney(肾) to those who were in need of it.
A．contribute
B．donate
C．provide
D．introduce
cosωt
