结肠癌的标志
AFP
B. CEA
C. PSA
D. CAL25
E. CAL5-3
Tile necklace has 96 pieces and they are worth, individually and______a lot of money.
A. wholly
B. joindy
C. collectively
D. completely
What does the word "murky" (Para. 3) probably mean?
A. Unclear.
B. Significant.
C. Obvious.
D. Exaggerated.
The demand made by the workers is that their salaries______to cover the increased cost of
A. increased
B. be increased
C. increasing
D. were increased