电路板起泡的处理方法是()。
A.压平线索板
B.在IC上面植上较大锡球
C.重新换一块
D.在电路板反面垫上吸足水的海绵,防止再度气泡
参考答案:A, B, D
Don’t be crazy about Korean TV programmes, _________ your life will be in a mess.
A.and
B.but
C.or
D.so
—Is your mother a doctor?
—_____ [ ]
A. Yes, it is.
B. No, he isn't.
C. Yes, she is.
D. No, it isn't.