脚手架立杆接长，顶层顶步可采用搭接，搭接长度不应小于（）m
参考答案：1m
The president said that it was a great honor for him ______ his country in the past two weeks.
A．to visit
B．to be visiting
C．to have visited
D．to have been visited
根据以下资料，回答131-135题。
2001～2015年间，新能源汽车五种技术专利申请数均高于上年的年份有（）个？
A.7
B.8
C.9
D.10
