How is “radio silence” imposed?（）
Which of the following is not a form of precipitation?（）
Steady precipitation is typical of（）.
Which type of precipitation is a product of the violent convection found in thunderstorms（）.
How does a coast radio station communicating by HF radio normally identify itself?（）
Radio Bearer Setup是一条（）信令。
Radio Beijing
Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.
Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification的相关协议为（）
（）is a radio receiver with ablity to sense direction of the incoming radio waves.
The portable radio apparatus means（）.
The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.
Steady precipitation is typical of（）．
沉淀反应（precipitation reaction）
147. Which of the following is not a form of precipitation? _____ .
As a popular saying has it, ________ epitomizes the wonder of the Great Wall for being the most precipitous part of it.
Being the most precipitous part of it, ________ epitomizes the wonder of the Great Wall.
Which of the following solar terms is about precipitation?
5 turn off a radio ____ hold a radio ____
11. A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as _____.
Boil 0.5 g of thepowdered tablets for 2 to 3 minutes with 10 mL of 5 M sodium hydroxide, cooland add an excess of 1 M sulfuric acid; a crystalline precipitate is produced.To a solution of the precipitate in water add iron (III) chloride solution R1;a _______ colour is produced.
precipitated（）
<table><tbody><tr><td>7 . 按照公共产品受益范围的标准，下列属于地方政府负责提供的是（）。</td></tr><tr><td><label><input id="radio7" value="a" type="radio" name="radio7"/></label>外交
precipitate（）
