某药的降解反应为一级反应,其反应速度常数k=0.0096天-1,其t0.9是
A. 1天
B. 5天
C. 8天
D. 11天
E. 72天
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某药的降解反应为一级反应,其反应速度常数k=0.0096天-1,其t1/2
A. 1天
B. 5天
C. 8天
D. 11天
E. 72天
The notion "the extent to which the sentence element contributes to the development of the
A. theme.
B. rheme.
C. communicative competence.
D. communicative dynamism.
Which of the following is not a description of sound segment[s]?
A. Voiceless.
Bilabial.
C. Alveolar.
D. Fricative.
______is a principal representative of The Prague School.
A. Mathesius
B. Halliday
C. Bloomfield
D. Chomsky