更多"With the technology of freezing ste"的相关试题:
[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
[单项选择]When stem cells specialize, they ______ .
A. grow into body parts
B. are destroyed
C. are set back to a pristine state
D. turn nose into kidney
[单项选择]The most versatile ______ embryonic stem cells, which ______ found in the embryo at the earliest stage of development and can grow into any part of the body.
A. are, are
B. is, is
C. are, is
D. is, are
[单项选择]The ______ from childhood to manhood is often a difficult time for a young man.
A. transition
B. transformation
C. transfer
D. transmission
[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]Franklin Roosevelt argued that the depression stemmed from the American economy's ______ flaws.
A. underlining
B. vulnerable
C. vulgar
D. underlying
[单项选择]Communication satellites generally use solar cells as their source of electric power, although some test satellites have used thermoelectric generators.
A. superior
B. authorized
C. former
D. experimental
[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]When squashed the stem and leaves of the jewelweed exude a juice that will soothe some skin irritations.（）
A. boiled
B. aged
C. crushed
D. chopped
[单项选择]What was Isaac Stem's relationship to Carnegie Hall
A. He made the movie Carnegie Hall in 1946.
B. He performed on opening night in 1891.
C. He tried to save the hall, beginning in 1960.
D. He opened a coffee shop in Carnegie Hall during the Depression.
[单项选择]The writer comments on Stem's investigation and analysis in a ______ tone.
A. indifferent
B. negative
C. positive
D. ironic
[单项选择]As to the stem-cell research, the Bush Administration's attitude is one of ______.
A. skepticism.
B. disapproval.
C. ambivalence.
D. prudence.
