我国城市燃气管道,压力为0.8MPa<P≤1.6MPa时,属于()。
A. 次高压B燃气管道
B. 次高压A燃气管道
C. 高压B燃气管道
D. 高压A燃气管道
区间隧道结构防水要求不得有线流和漏泥砂,当有少量漏水点时,每昼夜的漏水量不得大于()。
A. 0.5L/m2
B. 1.51/m2
C. 1.0L/m2
D. 2.0L/m2
用和回收率大于()%。
A. 10
B. 20
C. 30
D. 40
听力原文:W: When are you going to take your vacation?
M: I've got a sixteen day vacation starting from July 1.
W: Where are you going?
M: Florida and Hong Kong.
W: That's interesting. Is your family going as well?
M: Yeah. We'll stay in Florida for ten days and spend the rest of the time in Hong Kong. Then plan to climb some mountains ,go swimming and do some shopping.
W: Have a good trip.
What are they talking about?
A. Shopping.
B. Taking a vacation.
C. Visiting a friend.