上行船舶沿凸岸边滩上行时,发现跑舵,应立即用舵加以纠正,不让其跑舵。
参考答案:错
所谓胃黏膜屏障主要是指
A.胃黏膜丰富的血循环供应
B.胃黏膜上皮细胞膜的脂蛋白层
C.胃黏膜细胞的高度更新能力
D.胃腺体分泌的碱性可溶性黏液
E.肠抑胃素及正常的肠节律性运动
41.
Two types of stress:
Effects of stress--physical or emotional:
Guilty--useful, though most harmful:
Instances no need to feel guilty:
No one is perfect:
Life with a little stress--significant: