A "frozen" brain requires only ______ as one with a normal body temperature of 98.6 degrees Fahrenheit.
A、oxygen half as much
B、half as much oxygen
C、as half much oxygen
D、half oxygen as much
A、oxygen half as much
B、half as much oxygen
C、as half much oxygen
D、half oxygen as much
A、oxygen half as much
B、half as much oxygen
C、as half much oxygen
D、half oxygen as much
Producing a thermogram is ______.
A.expensive because of the high voltage the machine requires
B.a time-consuming process
C.inexpensive after the machine is purchased
D.an unsafe procedure
What is the A-level requirement for the course?
A.BBB.
B.BBC.
C.BCC.
D.There is no clear requirement.
A.The relationship of purchases made to time spent shopping.
B.The length of time required for drugstore shopping.
C.The increases in the size and stock of drugstores.
D.The buying of clothing from department stores.
During special period, as the outbreak of the Coronavirus Disease(COVID-19),Thailand require the passagers to present Health Certificate certifying that they have no risk of Coronavirus Disease(COVID-19).
Stem cells are cells that have not yet decided what they want to be when they grow up. That is, they can become blood cells, brain cells, or pretty much any other type of cell. Their versatility makes them extremely useful for medical research. The ethical snag is that the best stem cells are harvested from human embryos, killing them. For the most ardent pro-lifers, including Mr. Bush and many of his core supporters, that is murder. Proponents of embryonic stem-cell research point out that hordes of embryos are created during fertility treatment, and the vast majority of these are either frozen indefinitely or destroyed. Is it really wrong to use them for potentially life-saving research? Yes, said Mr. Bush on July 19th, flanked by some families who had "adopted" other people's frozen embryos and used them to have children of their own.
Mr. Bush's veto does not kill stem-cell research. Scientists who spurn federal cash may do as they please. The government still pays for research on stem cells taken from adults, a process that does not kill the donor. And a decision by Mr. Bush in 2001 allows federally-funded scientists to experiment on the few dozen embryonic stem-cell "lines" that already existed then, which can be propagated in a laboratory.
Nonetheless, scientists are furious with Mr. Bush. Federal funding would surely push them faster towards those elusive cures. Research based on adult stem cells may be promising, but not nearly as promising as that based on embryonic ones. There are worries that those few dozen embryonic stem-cell lines represent too narrow a gene pool, and that they cannot be endlessly extended without damaging them. Other countries, such as Britain and China, are enthusiastically experimenting on embryonic stem cells. But the world's most innovative nation is hanging back.
From the first paragraph, we learn that ______.
A.the House and Senate had not only passed the bill widely, but veto-proof margins.
B.most Americans support the bill although George Bush vetoed an opposite bill.
C.Mr. Bush's opinion is still final after the House and Senate had passed the bill by wide.
D.George Bush vetoed the first critical bill for embryonic adult-cell research this week.
A.The relationship of purchases made to time spent shopping.
B.The length of time required for drugstore shopping.
C.The increases in the size and stock for drugstore.
D.The buying of clothing from department stores.
The author uses the example of the soap bubble blower to show that ______.
A.skill is required to produce humor
B.neither too much exaggeration nor absolute explicitness is fit for humor
C.people should perfect the art of humor just as the bubble blower does to the bubbles
D.humor should make people frantic for a while
Which of the following statements is NOT true?
A.Continuous computer calculations are required for the automatic blind landing of an aircraft.
B.Military applications of computers require their very fast response ability.
C.Scaling down of all dimensions of a computer may result in faults developing.
D.The development to integrated circuits contributes a lot to the miniaturization of computers.
A.freezing…frozen
B.frozen…freezing
C.frozen…froze
D.freezing…froze
为了保护您的账号安全,请在“简答题”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!