It is thought that good actors would never forget their lines on the stage. Yet ________ is not always the case.
A. this
B. which
C. what
D. /
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Whether you succeed or fail, you must do your ________ .
A. the best
B. best
C. better
D. good
In the past ________ , they have had to trade oil for food.
A. ten decades
B. decade
C. ten years
D. ten year
Rock and Pop music have changed the face of music ________ since second half of the 20th century.
A. dramatist
B. dramatically
C. dramatic
D. drama
下列元件哪些属于PLC内部的字元件
A. Y
B. S
C. T
D
E. C
F. M
G. K1Y0
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