【单选题】You are at sea in an inflatable liferaft.In high latitudes,the greatest danger is ______.
A.
asphyxiation due to keeping the canopy closed
B.
hypothermia caused by cold temperature
C.
collapse of the raft due to cold temperatures
【单选题】A new computer system has been designed to stop ships sinking. The greatest danger 【21】______ a holed vessel is that flooding of its compartments will make the ship unstable enough to capsize. It is e...
【单选题】What is the greatest danger to life on Earth?
A.
Collision with small high-speed missiles.
B.
Collision with an astronomical body.
C.
Collision with stones from the sky.
D.
Collision with spacecrafts.
【简答题】-What is the greatest er for digestive diseases according to the author? - alcohol the greatest digestive diseases.
【简答题】生长发育的连续性表现为某些发育现象,如 、
【判断题】权威是实施奖惩的条件,奖惩又是强化权威的手段。
【判断题】权威是实施奖惩的条件,奖惩又是强化权威的手段。( )
【判断题】如机床所处环境的温度昼夜变化较大,应选择在温度变化幅度较小的一段时间进行检测。
【判断题】摇臂钻床没有汇流环装置,故在用手推动摇臂回转时,必须注意不能总是沿一个方向连续回转。