Serial.available()函数返回值为（）

表示：串口 第二个大插槽/第二小插槽/第二个接口的是（ ） A: serial 0/0/0 B: serial 1/1/1 C: serial 2/2/2 D: serial 3/3/3

使用串口读取数据时,通常需要搭配使用Serial.available()函数。

9. There were _________ for Saturday’s movie. 　A. not available tickets tickets B. no available C. no tickets available D. tickets no available A: A. not available tickets B: B. no available C: C. no tickets available D: D. tickets no available

‌There were _________ for Sunday's movie. ‏ A: not available tickets B: no available C: no tickets available D: tickets no available

There were _________ for Saturday’s concert. A) not available tickets C) no available tickets B) no tickets available D) tickets no available

查看cisco路由器串口1的状态的配置命令是（）。 A: Ashow seriai 1 B: Bshow port serial 1 C: Cshow interfaces serial D: Dshow interfaces serial 1

串口初始化函数Serial.begin(),通常在( )函数中使用。. A: setup( ) B: loop() C: Serial.available( ) D: Serial.read( )

There were _________ for Saturday’s movie.[br][/br] A) not available tickets [br][/br]B )no available tickets [br][/br]C) no tickets available [br][/br]D) tickets no available

The stopway can be used to increase the length of . A: the takeoff distance available (TODA) B: the acceleration-stop distance available (ASDA) C: the takeoff run available (TORA) D: the landing distance available (LDA)