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【单选题】
喷锚支护是地下洞室支护加固常用方法之一，支护类型有喷混凝土、锚杆、锚索、喷混凝土加锚杆、挂网喷混凝土加锚杆等，下列喷锚支护的适用性叙述中，不正确的是（）。A.
及时性和适时性：一般在低地应力区，围岩变形快、自稳时间短，喷锚支护要及时；在高应力区，一般要注意适时性
B.
无论在干燥少水洞段，还是在线状流水的洞段、大涌水洞段，喷锚支护加固围岩的效果都十分显著
C.
在围岩稳定性差的洞段，进行围岩的超前加固处理措施后，再实施开挖围岩的喷锚支护
D.
围岩稳定性差的洞段宜进行变形观测，以了解喷锚支护的效果并决定是否进行补强加固措施
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【多选题】分析以下代码,说法正确的是 void loop() { a=Serial.read(); switch(a) { case 'A':Serial.println("apple");delay(1000); case 'B':Serial.println("banana");delay(1000); case 'C':Serial.println("cat");delay(1000); case '...
A.
当通过串口调试器发送字符A时，arduino通过串口仅传送apple字符
B.
当通过串口调试器发送字符B时，arduino通过串口连续传送banana cat desk 字符
C.
当通过串口调试器发送字符C 时，arduino通过串口连续传送cat desk NO 字符
D.
当通过串口调试器发送字符D 时，arduino通过串口连续传送desk NO 字符
【简答题】void loop() { a=Serial.read(); switch(a) { case 'A':Serial.println("apple");delay(1000);break; case 'B':Serial.println("banana");delay(1000);break; case 'C':Serial.println("cat");delay(1000);break; ca...
【单选题】void loop() { a=Serial.read(); switch(a) { case 'A':Serial.println("apple");delay(1000); case 'B':Serial.println("banana");delay(1000); case 'C':Serial.println("cat");delay(1000);break; case 'D':Seria...
A.
apple
B.
apple banana
C.
apple banana cat
D.
apple banana cat desk NO
【单选题】How to properly say sorry and thanks in case of the delay?
A.
We are sorry to inform you that the flight has been cancelled.
B.
It is pitiful that the goods are sold out.
C.
We apologize for any inconvenience caused and thank you for your patience and understanding.
D.
We are waiting for air traffic control clearance.
【单选题】How to inform the passenger of the delay in case of bad weather? （ ）
A.
Please fasten your seat belt and refrain from smoking.
B.
Our flight will be delayed because of bad weather conditions.
C.
The flight has been cancelled.
D.
We will be taking off soon.
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