管道运输的缺点是（）。 A.不占用或较少占用地面位置 B.维修成本低 C.不适合固态

孔子东游，见两小儿辩斗，问其故．

一儿曰：“我以日始出时去人近，而日中时远也．”

一儿以日初远，而日中时近也．

一儿曰：“日初出大如车盖，及日中则如盘盂，此不为远者小而近者大乎？”

一儿曰：“日初出沧沧凉凉，及其日中如探汤，此不为近者热而远者凉乎？”

孔子不能决也．

两小儿笑曰：“孰为你多知乎！”

阅读理解上文，完成下面的问题．

（1）两小儿在争辩中，用到了物理学中______部分的知识．

（2）他们探索自然现象时采用的方法是______；

（3）他们在探索自然现象时采用的态度是______．

（4）他们在争辩时，各执己见，不接纳对方的观点，表现了他们______．

（5）他们对孔子的议论说明两小儿______．

阅读理解。

     It's easy to see how the sawfish got its name. These frightful creatures can grow to be more

than 6 meters long. Their bodies are flat and winged, like underwater airplanes. And their noses

are shaped like chainsaws.

     Sawfish are food hunters of the sea. When a sawfish is hungry, it waves its sharptoothed snout

(口鼻部) through a group of fish. Then, it lifts its nose and uses its mouth to draw the injured victims.

     Hardy (适应力强的) population of sawfish thrived in warm waters along coastlines around the

world for thousands of years. Over the past 200 years, however, human actions have severely

endangered sawfish. Threats include fishing nets that trap the huge animals, often by mistake.

     Some people collect sawfish's snouts as prizes: One snout recently sold for nearly $1,600 online.

In some Asian cultures, the toothy snouts are used in ceremonies to drive evil and disease away. And

sawfish are also delicious. A growing demand in Asia for the fish's fins for a pricey soup has contributed

to the fish's disappearance. Compared with other fish, sawfish give birth late in life and at slow rates,

which makes it hard for them to recover from overfishing.

     New efforts now aim to restore sawfish population. Beginning next month, an international agreement

will provide protection for all seven of the world's sawfish species. Scientists are hoping that it's not too

late to save the sawfish.

     "Until 1998, this fish had never been formally studied in the United States," says Tonya Wiley of the

Mote Marine Laboratory in Sarasota, FIA."We didn't know such basic things as where they live, what

habitat they use, how often they breed, how many young they have- even what age sawfish are when

they begin breeding."

     Through historical studies and field research, scientists have become aware of how much the fish's

numbers have decreased. Today, there may be 90 percent fewer sawfish than there used to be. Wiley

estimates that only 3,000 to 6,000 sawfish remain in US waters.

                                                                Sawfish

电铲装汽车时，必须按质量标准装车，从车箱中心到车帮最大高度为（）米，并且不准装（）。

一组记录的排序码为(46，79，56，38，40，84)，则利用快速排序的方法，以第一个记录为基准得到的一次划分结果为( )。

A．38，40，46，56，79，84

B．40，38，46，79，56，84

C．40，38，46，56，79，84

D．40，38，46，84，56，79

变化的磁场会使导体产生感应电流。