第二恒磨牙窝沟封闭的适宜年龄A．6～7岁 B．7～9岁 C．9～11岁 D．11～1

Mr. King worked in a factory. He liked playing soccer and spent much time on it, so he was sometimes late for work. His boss was so angry that he fired Mr. King. Mr. King couldn't find another job. Finally he got into trouble and lived a difficult life.

One of his friends felt sorry for turn and introduced him to a headmaster, whose school was just in need of swimming coach (教练). Mr. King began to teach the school children to swim. He wasn't a good coach. Two months later, the children learned nothing. Few of them could swim.

It was a hot Saturday. The children wouldn't stay in the classroom and wanted to swim in the river. Mr. King failed to stop them. Before they started, he drew a red line below the knee of each child. He said to them, "Come out of the river at once if the water reaches the line."

小题1:Why did the boss fire Mr. King?

A．Because Mr. King didn't like his job,

B．Because Mr. King was ill.

C．Because Mr. King talked too much.

D．Because Mr. King was sometimes late for work小题2: Mr. King couldn't find another job and his life was_.

A．happy

B．hard

C．relaxing

D．free小题3:Who helped Mr. King find a job in a school?

A．The boss of the factory.

B．His friend.

C．The school children.

D．Nobody.小题4:Two months later, the children learned nothing because_.

A．Mr. King taught them to play soccer

B．they didn't like swimming at all

C．they were afraid of water

D．Mr. King was a poor coach小题5:Mr. King _____, so he drew a red line below the knee of each child.

A．didn't want the children to swim

B．wanted to make the children look funny

C．wanted to make the children happy

D．wanted to help the children swim better

影响除灰管道磨损的主要因素有灰渣颗粒尺寸、灰渣颗粒硬度和形状、输送灰渣的浓度及（）。

A.管道长度；

B.管道流速；

C.流体黏度；

D.管道坡度。

--- How’s your new babysitter?

--- We ______ ask for a better one. All our kids love her so much.

A．should

B．might

C．mustn’t

D．couldn’t

鼠标是计算机的（）。

A、输出设备

B、操作系统

C、主机设备

D、输入设备

弃船演习的日期、演习的详细情况、其他救生设备演习以及船上训练均应记载于主管机关规定的航海日志内，一般由（）负责该记录。

A.船长

B.大副

C.三副