【单选题】Virtual Reality Immersion includes the following aspects EXCEPT __________.
A.
the user feels present in the immediate physical environment rather than in the mediated environment
B.
it is a combination of a sense of immersion and interactivity
C.
the user can have a feeling of being inside and a part of that world
D.
an effective VR experience causes the user to become immersed in the virtual environment
【单选题】Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?
A.
The coolant temperature must be maintained at 180℃
B.
The thermostatic bypass valves must be manually opened before the engine is started
C.
The pressure cap must be removed while the engine is secured
D.
Electrical power to the heater must be secured before the cooling system is drained
【单选题】患者,男,28岁,受凉后畏寒、发热、咳嗽、右侧胸痛5天。查体:急性病容,右侧呼吸运动减弱,语音震颤增强,右下肺可闻及支气管呼吸音及胸膜摩檫音。最可能诊断为
【简答题】已知函数 在x=0处连续,求a、b的值。
【单选题】发热、咳嗽、右侧胸痛5天。查体:急性热病容,右侧肺呼吸运动减弱,语音震颤增强,右下肺可闻支气管呼吸音及胸膜摩擦音。最可能诊断为( )
【单选题】An immersion suit should be equipped with a/an ______.
A.
air bottle for breathing
B.
whistle and hand held flare
C.
whistle,strobe light and reflective tape
D.
whistle,hand held flare and sea dye marker
【简答题】已知函数 ,在 x =1处连续. (I)求 a 的值; (II)求函数 的单调减区间; (III)若不等式 恒成立,求 c 的取值范围.
【单选题】From ________ the information concerning the tons per inch or centimeter immersion of a vessel shall be usually found.