( )是指触碰岸壁、码头、航标、桥墩、浮动设施、钻井平台等水上水下建筑物或者沉船、沉

Mr. Knight was the manager of a hotel. One weekend all of the hotels in the city were full because there was a large meeting. On Friday, three men came into the hotel and asked for rooms. Mr. Knight said there were no rooms ready because of the meeting. The men were unhappy.

Mr. Knight wanted to help them. He remembered that Room 418, a small room, was empty. He asked them if they could share a room. The three men said they would. Mr. Knight said the room would be thirty dollars; ten dollars for each person. Each man gave him the money and then went up to the room.

Mr. Knight soon began to feel sorry. “Thirty dollars is a lot to ask as a price for that small room.” he thought. He called his assistant over and said, “Here is five dollars. Take it to the men in Room 418. I asked too much for their room.”

The assistant took the money. While he was on the way there, he started to think, “How can three men divide five dollars? I’ll give them each only one dollar and keep the two dollars for myself. The men will be happy to get something back. And Mr. Knight will never know.” So the assistant returned one dollar to each man.

Each man had at first paid ten dollars. After the assistant returned them one dollar each, each had actually(in fact) paid nine. There were three men. $9´3="$27." The assistant kept$2. $27+$2="$29." Where is the missing dollar?

小题1:With the help of the manager, the three men___________.

A．went to another hotel

B．each got a small room for the night

C．stayed together in a small room

D．got a small room Mr. Knight kept for himself小题2:At first___________.

A．$27 was paid by the three men

B．$30 was paid by each of the three men

C．$25 was paid by the three men

D．$10 was paid by each of the three men小题3:The assistant___________.

A．helped the men to divide the money

B．kept two dollars for himself

C．kept three dollars for himself

D．returned three dollars to the men and two to the manger小题4:Where is the missing dollar?

A．It was taken by the assistant, too.

B．It was taken by Mr. Knight.

C．It was taken by the three men.

D．In fact, there wasn’t any missing dollar.

垂直线性良好的超声波探伤仪，用0°探头发现同一对比试块上的某一平底孔回波，比同声程处φ3mm平底孔回波低7dB，则该平底孔约为（）。

A、φ1mm

B、φ1.5mm

C、φ2mm

D、φ2.5mm

软骨细胞分为（）层，其中最薄的是（）。

A.5；切线层

B.4；钙化层

C.5；辐射层

D.3；切线层

E.4；软骨下骨

李涉的《题鹤林寺》中写道：“因过竹院逢僧话，偷得浮生半日闲。”请问鹤林寺在我国的哪个省？

减轻摩托车和自行车碰撞导致的头部伤害的最有效方式是什么？