Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

I thought she was the right person for the position, yet it turned out that she was quite useless.

 A. I was mistaken about her suitability for the position since she proved rather incompetent

B. Because I was expecting her to be competent, I was shocked to see her perform rather badly

C. I was right in thinking that she was totally useless for the job

D. Contrary to my initial impression, she was totally for the position

Hai bóng đèn có các hiệu điện thế định mức lần lượt là U 1 và U 2 . Biết công suất định mức của hai bóng đèn đó bằng nhau. Tỉ số giữa điện trở của các bóng đèn R 1 R 2 bằng

A.  U 1 U 2

B.  U 2 U 1

C.  U 1 U 2 2

D.  U 2 U 1 2

Trong các tia sau, tia nào là dòng các hạt không mang điện tích?

A. Tia g

B. Tia  β +

C. Tia α

D. Tia  β -