血清壁细胞抗体阳性多见于（）。
A.急性单纯性胃炎
B.慢性胃体胃炎
C.慢性胃窦胃炎
D.胃溃疡
E.十二指肠壶腹部溃疡
参考答案：B
—You’re coughing badly，Martin. Why not give up smoking?
—Give up smoking？Easier said than done，Amy. Once you ______ the habit of smoking，it is very hard for you to ______.
A．keep up; break it away
B．take up; drop it out
C．pick up; get rid of it
D．build up; do away with it
从前进三到后退三的换向操作时间最长的主机类型是：（）
A.蒸汽机船
B.内燃机船
C.汽轮机船
D.蒸汽机船与汽轮机船
