下列哪一种不属于椎基底动脉供血不足的症状（）
A.眩晕
B.眼球运动障碍
C.交叉性麻痹
D.吞咽困难
E.失语症
参考答案：E
馒头中的孔洞是（）遇热膨胀而形成的，这种气体是酵母菌分解（）时产生的。因此，酵母菌的营养方式是（）。
Teachers in a/an ______ classroom are encouraged to show approval for each and every correct performance by their students，and the drills are designed to produce success for the students.
A．Grammar-Translation
B．Situational
C．Audiolingual
D．Communicative
