Wettability of a liquid penetrant is controlled by which of the following factors（）
A. Cosine of the contact angle
B. Viscosity
C. Surface tension
D. Both cosine of the contact angle and surface tension
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Which of the following is the least sensitive developer（）
A. Dry powder
B. Aqueous soluble
C. Aqueous suspendable
D. Non-aqueous wet
contingent（）
A. groups of people
B. distinction
C. notion
D. morality
symbolize（）
A. make signs
B. show pity
C. represent
D. present
pedantic（）
A. of a person who likes music
B. of a person who pays attention to unimportant news
C. of a person who stresses on sports
D. of a person who emphasizes trivial points of learning
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