下列变化属于化学变化的是（）。
A、汽油挥发
B、气化液化
C、白磷自燃
D、灯丝发光
参考答案：C
My friend, Jack, will have a holiday as soon as he ________ his work next week.
A．finishes
B．will finish
C．finished
D．finish
胰高血糖素可以
A.抑制胃酸分泌
B.促进胃酸分泌
C.抑制胆汁分泌
D.促进肝糖元合成
E.促进胃蛋白酶分泌
