【单选题】某种材料其含水率与大气平衡时的抗压强度为40.0Mpa,干燥时的抗压强度为42.0Mpa,吸水饱和时的抗压强度为38.0Mpa,则该材料的软化系数和耐水性是( )。
【判断题】An office automation system usually includes a video display terminal, input devices, and a hard-copy output device for “ letter-quality ” printing, etc .
【判断题】Letter input devices, pointing input devices, imaging and video input devices, and audio input devices are four types of input devices.
【单选题】功能定位主要包括经济地理特征分析、( )、城市交通结构的协调分析和轨道交通的功能评估等。
【简答题】The typical letter input device is (1). It is also one of the most common (2) devices. The keyboard has (3) for characters (letters, numbers and punctuation marks) and special (4). Pressing the keys t...
【简答题】Office (1) is the application of computer and communications technology to i mprove the productivity of clerical and managerial (2) workers. The major functional c omponents of an office automation (3...
【判断题】电负性大的元素充当配位原子,其配位能力强。( )
【单选题】下列说法中正确的是 ( )
D.
在 [Cu(en) 2 ] 2+ 中, Cu 2+ 的配位数是 4