更多"'It carries white blood cells and d"的相关试题:
[单项选择]All of the following cells arise from cells arise from undifferentiated mesenchymal cells within connective tissue and remain there permanently EXCEPT？
A. pericytes
B. eosinophils
C. fibrolasts
D. osteoblasts
E. adipocytes
[单项选择]Living things are ______ cells, and cells do not grow to more than twice the size they were at first.
A. made from
B. made up of
C. made up from
D. made of
[单项选择]Living things are ________ cells, and cells do not grow to more than twice the size they were at first.
A. made from
B. made up of
C. made up from
D. made of
[单项选择]
Passage Four Television carries more national advertising than any others in the United States. The same is true in some smaller countries such as Spain and Portugal, where it is the only medium reaching a general national audience. In many countries, Sweden and Denmark, for example--the stateowned television accepts no advertising. In many other countries the amount of commercial time is extremely limited, as in France, Germany, and Italy. Soviet state-owned television began accepting a limited amount of advertising in 1988. The chief reason for the population of television among United States advertisers is that it it reaches a vast number of people at the same time. While it can cost well over 100,000 dollars, a 30- second commercial on network television can be seen and heard by as many as 25 million viewers. For manufacturers who must make prospects aware of their products and convince them of its benefits immediately, there is nothing as efficient as television adver
A. TV can make advertisers aware of their products.
B. TV is more popular than any other medium in the United States.
C. TV covers a large audience at the same time.
D. TV carries more national advertising than other media in the United States.
[单项选择]The phrase "force some financially fragile carries into liquidation" (Paragraph 6 ) may probably mean ______.
A. compel them to reduce their flight
B. make them do nothing but to declare bankruptcy
C. push them to be destroyed
D. bring them into a liquid state
[单项选择]An institution that properly carries the name university is a more comprehensive and complex institution than any other kind of higher education ______.
A. settlement
B. establishment
C. construction
D. structure
[单项选择]Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.
A. determined
B. argued
C. pretended
D. hypothesized
[单项选择]Communication satellites generally use solar cells as their source of electric power, although some {{U}}test{{/U}} satellites have used thermoelectric generators.
A. superior
B. authorized
C. former
D. experimental
[单项选择]UCSD carries out a variety of measurements for garbage and recycling including ________.
A. organizing the students to help collection of donated objects
B. preparing empty collection containers everyday
C. providing a number of places to store the denoted things
D. discouraging the students to discard materials that can be reused
[单项选择]What does it represent if a bride wears or carries something old
[单项选择]Layer n on one machine carries on a conversation with layer n on another machine. The rules and conventions used in this conversation are collectively known as the layer n
A. topology
B. protocol
C. service
D. peer
[单项选择]Insulin is manufactured by specialized cells in the pancreas and released ______ glucose reaches a certain concentration in the bloodstream.
A. (which
B. (whenever
C. (how
D. (during
[单项选择]With the technology of freezing stem cells from different strains of chicken, ______.
A. chicken farmers can order certain strains of chicken for economic reasons
B. origen can hardly supply all the strains of chicken the market might need
C. chicken farmers can order certain strains of chicken only
D. origen can be supplied with whatever strain they need
