患者出现下列哪些现象,表明胃管插入气管,应立即拔出胃管,休息片刻后再重新插入()。
A.恶心
B.呛咳
C.发绀
D.呕吐
E.呼吸困难
参考答案:B, C, E
小夹板固定扎带松紧度以可以上下移动多少厘米为合适()。
A.2
B.1.5
C.1
D.0.5
E.3
—Where did you pick up the stamp?
—It was at the post office ________ we worked in the summer vacation.
A.that
B.where
C.which
D.when