Let me ________ a look at your new watch.[ ]
A. have
B. to have
C. having
D. has
答案:A
用于内涂层防腐的涂料,经实践证明环氧树脂性能最好。
运动的电荷和变化的电场都可以产生()。
A.电压
B.磁场
C.电场
D.自感