中医药大学专升本招生简章什么时候出？

设平面π1：2x+y+4z+4=0,π2：2x-8y+z+1=0,则平面π1与π2的位置关系是（）

A.相交且垂直
B.相交但不垂直
C.平行但不重合
D.重合

“If there is one thing I’m sure about,it is that in a hundred years from now we will still be reading newspapers．It is not that newspapers are a necessity．Even now some people get most of their news from television or radio．Many buy a paper only on Saturday or Sunday．But for most people reading a newspaper has become a habit passed down from generation to generation．
The nature of what is news may change．What basically makes news is what affects our lives—the big political stories,the coverage of the wars,earthquakes and other disasters,will continue much the same．I think there will be more coverage of scientific research,though．It’s already happening in areas that may directly affect our lives,like genetic(基因)engineering．In the future,I think there will be more coverage of scientific explanations of why we feel as we do—as we develop a better understanding of how the brain operates and what our feelings really are．
It’s quite possible that in the next century newspapers will be transmitted(传送)electronically from Fleet Street and printed out in our own home．In fact,I’m pretty sure that how it will happen in the future．You will probably be able to choose from a menu,making up your own newspaper by picking out the things you want to read—sports and international news,et
C．
I think people have got it wrong when they talk about competition between the different media(媒体)．They actually feed off each other．Some people once foresaw that television would kill off newspapers,but that hasn’t happene
D．What is read on the printed page lasts longer than pictures on a screen or sound lost in the air．And as for the Internet,it’s never really pleasant to read something just on a screen．

From the passage,we can infer_______．

A.newspapers will win the competition among the different media
B.newspapers will stay with us together with other media
C.television will take the place of newspaper
D.the writer believe some media will die out

Every year gray whales migrate from the Bering Sea in Alaska to the Baja Peninsula in Mexico.
Eleven gray whales have died in the San Francisco Bay in the last three weeks．No one knows why the whales are dying.
Last year 270 whales died along the whales'migration route．Many people think starvation is the cause．This year the dead whales seem to have more blubber(fat)on them.
Twenty years ago,the gray whale was listed as an endangered species.
Some scientists think that the larger number of whales makes it hard to find enough food．More whales create more pressure on the food supply,a supply that some scientists say may have dwindled as a result of the warm waters of El Nino.
Most of the whales have been dead for many days before they are found and studied．This makes it hard to find the reason for death.
65 whales have been seen in the San Francisco Bay Area this year compared to 17 last year．The whales could be dying from many diseases,but it may be over-population．

Which of the following is NOT a possible reason for whales dying?

A.Pneumoni
B.Brain infectio
C.Over-populatio
D.Over-eatin