胰腺钩突部肿瘤可引起（） A.下腔静脉前移 B.肠系膜上静脉前移 C.腹主动脉前移

A punctual person is in the habit of doing a thing at the correct time and is never late for anything.

An unpunctual man never does what he has to do at the right time. He is always in a hurry and in the end loses both time and his good name. A lost thing may be found again, but lost time can never be got back. Time is more useful than material things. In fact, time is life itself. An unpunctual man is always wasting his most important things as well as others'. An unpunctual person is always saying unhappily that he finds no time to answer letters or return calls. But the man who really has much to do is very careful of his time. He knows that he can not finish all his work unless he carefully does every piece of work.

Being unpunctual is the sign of disrespect (不尊重_) towards others. If a person is invited to

dinner and arrives later than the time when he should be there, he keeps all the other guests (客人)

waiting for him. Usually this will be thought as a great disrespect to the host and all the other guests.

Not like a punctual person, an unpunctual one can't do his duty wonderfully, whether it is public or personal. Imagine how it would be if those who should do important tasks failed to be on time. A man who is known to be often unpunctual is never believed by his friends or fellow men.

小题1:The Chinese meaning of the word "punctual" in this passage is probably “      ”.                                                                      

A．听话的

B．守时的

C．守纪律的

D．能干的小题2:Which of the following is TRUE according to the passage?

A．An unpunctual person often has more time.

B．An unpunctual person has more work to do.

C．A punctual person often has a busy life.

D．A punctual person often does his work wonderfully.小题3:When you are invited to dinner, you'd better arrive there        .

A．in a hurry

B．after the host

C．at the decided time

D．before other guests小题4:From the passage, we learn that an unpunctual man usually          in the end.

A．saves time for others

B．leaves his family and friends

C．gets his chances and knowledge

D．loses his time and good name

我们要全面考察长城的建筑技术，选择的范围应是[ ]

A．西起临洮东到辽东              

B．西起临洮东到鸭绿江  

C．西起嘉峪关东到鸭绿江          

D．西起嘉峪关东到辽东

如果有机玻璃槽的内壁很光滑，魔丸的运动会是怎样？如果是很粗糙，又会是怎样？

汽车产品和汽车零件的生产类型？

在一定条件下，将3molA 和1mol B 两种气体混合于固定容积为2L的密闭容器中，发生如下反应：3A（g）+B（g） xC（g）+ 2D（g）。2min末该反应达到平衡，生成0.8mol D ，并测得C的浓度为0.2mol·L^－1。请填空：

（1）x=__________

（2）正反应是放热反应，则升高温度，正反应速率       ，逆反应速率       。（填升高、降低或不变）

（3）B的转化率为_________。

（4）能判断该反应达到平衡状态的依据是________（填字母）

A．混合气体的密度不变

B．容器中的压强不再变化

C．生成D的反应速率是生成B的反应速率的2倍

D．单位时间内生成3molA，同时生成1molB