某弱酸性药物在pH＝7．0溶液中解离90％，问其pKa值约为（）
A．5
B．6
C．7
D．8
E．9
参考答案：B
椒麻汁在突出椒麻味时还必须以______作为基础。
A．酸甜味
B．麻辣味
C．鲜香味
D．咸鲜味
When I came back, I found my bicycle was ______.
A. missed B. losingC. robbed D. gone
