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The
defect
occurs in the first eight weeks of pregnancy, though no one understands why, said Dr. Solomon, the obstetrician with the Medical Center for Children, the University of Pennsylvania, Philadelphia, US.
New research methods are being brought to ______the subject.
BSection A/B
Laboratory tests are
positive
for HIV and show a low lymphocyte count.
The method______further investigation.
Let"s
meet halfway
and each pay half the damage.
Last Sunday she came to visit us out of the blue. The italicized phrase means ______.
The radiopharmaceuticals used in nuclear medicine
emit
gamma rays that can be detected externally by special types of cameras.
The patient who takes interest in everything and everybody is a
formidable
adversary for disease.
The tendency of the human body to reject foreign matter is the main
obstacle
to successful organ transplantation.
Niagara Falls is a great tourist______, drawing millions of visitors every year.
Unfortunately, our vacation plans______on account of transport strikes.
Initial reports were that multiple waves of warplanes bombed central Baghdad,
hitting
oil refineries and the airport.
The leopard is stronger than any other of the great
predators
.
In spite of a problem with the
faulty
equipment, some very useful work was accomplished.
[此试题无题干]
When Picasso was particularly poor, he might have tried to
obliterated
the original composition by painting over it on canvases.
Generally, the smoker feels stimulated first, but this stimulation soon______ persistent tranquilization.
The boy showed
cleverness
in making toys out of scraps of discarded wood.
He made a career of
imitating
famous people for night club audiences.