问题 单项选择题

止水橡皮修理后,两侧止水中心距离和顶止水中心至底止水底缘距离的偏差均不应超过(),止水表面的平整度为()。闸门处于工作部位后,止水橡皮的压缩量应符合图纸要求,其允许偏差为()。

A、±2mm,1mm,+2mm,-1mm

B、±2mm,2mm,+2mm,-1mm

C、±3mm,2mm,+2mm,-1mm

D、±3mm,2mm,+1mm,-1mm

答案

参考答案:C

阅读理解

_______71_______ It is a very happy day for many boys and girls. Before the term ends in some schools, the children act a nativity (基督诞生) or "birth" play, showing how Jesus was born in a stable.(马棚).

On the twenty-fourth of December, all children are very excited.______72____ The younger children think that Father Christmas will come down the chimney of fireplace, so they hang up a sock for him to put presents in. The greedy ones even hang up a pillowcase or a sack to try to get more presents.________73_____

On Christmas morning, the children wake up very early. Some even turn on the light at two o'clock, and most of them are awake by six o'clock although there is no light in England for another hour or two at this time of the year.

_____74______ At about one o'clock in the afternoon, the Christmas dinner is brought in._____75______ Children search in their Christmas pudding for new coins which are hidden in it. The rest of the day is full of games and eating until the happiness of all Christian holidays comes to an end.

A.People are often busy going shopping.

B.The turkey or chicken is quickly eaten.

C.Now the Chinese people also celebrate Christmas.

D.Children look for their presents, and the young ones play while the dinner is prepared.E. Later that night, Father or Mother will put presents in the sock, and leave others at the side of the bed.

F. Usually they are sent to bed early so that their parents can get the presents ready.

G. Christmas Day falls on the twenty-fifth of December.

单项选择题