密封胶使用时应均匀,应( )。
A.无间断地涂抹在两密封面上
B.等距间断地涂抹在两密封面上
C.无间断地涂抹在一个密封面上
D.等距间断地涂抹在一个密封面上
参考答案:A
When I talked with my grandma on the phone, she sounded weak, but by the time we()up, her voice had been full of life.
A. were hanging
B. had hung
C. hung
D. would hang
在技术引进基础上,受囿于已有的技术范式,并沿既定技术轨迹而发展的技术创新方式是()。
A.自主创新
B.合作创新
C.二次创新
D.集成创新