水泥混凝土路面施工,若中断1h以上,需设置横向施工缝。
参考答案:错
完成对话,每空一词。
A: Hello?
B: Hello. May I 1______ to Helen, please?
A: Yes, speaking. Who is 2______, please?
B: This is Jane. I am calling from my new home.
A: Your new home? Where?
B: It is near Xinjiekou. The street is busy and I can see so many beautiful buildings on the street.
A: Is it big?
B: No. It is quite 3______. It has only a bedroom, a dining room and a kitchen.
A: How can I get there?
B: You can 4______ the No.106 bus.
A: That's great! What's your telephone 5______?
B: It is 8996 3265.
A: OK. I will go to visit you when I am free. Goodbye.
B: Goodbye.
根据热力学第二定律判断,下列( )说法是正确的。
A.热量能从高温物体传到低温物体,但不能从低温物体传到高温物体
B.功可以全部变为热,但热不能全部变为功
C.气体能自由膨胀,但不能自动收缩
D.有规则运动的能量能够变为无规则运动的能量,但无规则运动的能量不能变为有规则运动的能量