确诊霍乱最可靠的依据是（）。
A.粪便培养霍乱弧菌阳性
B.粪便涂片镜检阳性
C.严重腹泻
D.明显脱水
E.流行病学资料
参考答案：A
—How does Jack usually go to school?
—He ______ ride a bike, but now he ______ there to lose weight. [ ]
A. used to, is used to walk
B. was used to, is used to walking
C. was used to, is used to walk
D. used to, is used to walking
我们平时所吃的面粉是由小麦的胚乳加工而成的．______．
