引起发作性咳嗽的疾病有下列哪种()。
A.肺结核
B.百日咳
C.支气管扩张
D.慢性肺脓肿
E.慢性支气管炎
参考答案:B
解析:阵发性痉挛性咳嗽是百日咳的特点。
根据句意及首字母提示完成单词。
1. The c________ of one floor is the floor of the next one above.
2. The teacher asked me to f_________ a chair from the next room.
3. Remember to r___________ your hand if you have any questions to ask.
4. I'm sorry. I beg your p_________.
5.Rock music is well-known for its strong and fast b_________.
钢管扣件式脚手架连接时,用于连接扣紧两根互相垂直相交的钢管的扣件是()
A.直角扣件
B.旋转扣件
C.对接扣件
D.任意扣件