胃蛋白酶缺乏时，粪便镜检常见何种物质增多（）。
A．淀粉颗粒
B．脂肪小滴
C．胶原纤维
D．肌肉纤维
E．植物纤维
参考答案：C
在准工作状态时配水管道内不充水，由火灾报警系统自动开启雨淋阀后，转换为湿式系统的灭火系统为（）灭火系统。
A．湿式自动喷水
B．干式自动喷水灭火
C．预作用自动喷水
D．雨淋
—Hi, David, I heard you had an accident this morning．
—Yes．Luckily, I hit the brakes in time ______ I would have been injured badly．
A．and
B．but
C．or
D．so
—Yes．Luckily, I hit the brakes in time ______ I would have been injured badly．