【单选题】How can a SART’s effective range be maximized?______
A.
The SART should be placed in water immediately upon activation.
B.
The SART should be held as high as possible.
C.
Switch the SART into the “high” power position.
D.
If possible, the SART should be mounted horizontally so that its signal matches that of the searching radar signal.
【简答题】目前GENER机的透亮工艺其烘烤温度是()。
【单选题】A SART will generate() when being interrogated by X-band radar.
A.
on-scene communications
【单选题】下表给出几种物质的熔、沸点: NaCl MgCl 2 AlCl 3 SiCl 4 单质 B 熔点 /°C 801 710 180 - 68 2 300 沸点 /°C 1 465 1 418 160 57 2 500 判断下列有关说法中错误的是 ( )
D.
NaCl中离子键的强度比MgCl 2 中的小
【单选题】下表给出几种氯化物的熔、沸点: NaCl MgCl 2 CaCl 2 SiCl 4 熔点(°C) 801 710 782 -68 沸点(°C) 1 465 1 418 1 600 57.6 则下列各项中与表中数据一致的有( ) 1CaCl 2 属于离子晶体 2SiCl 4 是分子晶体 31 500 °C时,NaCl可汽化 4MgCl 2 水溶液不能导电
【简答题】A) procession B) profession C) possession D) preference76.A) procession B) profession C) possession D) preference