更多"Two techniques have recently been d"的相关试题:
[单项选择]Two techniques have recently been developed to simplify research and reduce the number of nonhuman primates needed in studies of certain complex hormonal reactions. One technique involves the culturing of primate pituitary cells and the cells of certain human turnouts. In the other, animal oviduct tissue is transplanted under the skin of laboratory primates. Both culturing techniques complement existing methods of studying intact animals.
With an in vitro culturing technique, researchers are deciphering how biochemical agents regulate the secretion of prolactin, the pituitary hormone that promotes milk production. The cultured cells survive for as long as a month, and they do not require serum, a commonly used culture ingredient that can influence cellular function and confound study results. One primate pituitary gland may yield enough cells for as many as 72 culture dishes, which otherwise would require as many animals.
The other technique allows scientists to monitor cellu
A. reproductive organs of nonhuman primates
B. diseases of the pituitary glands
C. in vitro studies of pituitary hormones
D. techniques for studying hormonal reactions
[单项选择]Brotherly Love
Adidas and Puma have been two of the biggest names in sports shoe manufacturing for over half a century.
Since 1928 they have supplied shoes for Olympic athletes, World Cup-winning football heroes, Muhammad Ali, hip hop stars and rock musicians famous all over the world. But the story of these two companies begins in one house in the town of Herzogenaurach, Germany.
Adolph and Rudolph Dassler were the sons of a shoemaker. They loved sport but complained that they could never find comfortable shoes to play in. Rudolph always said, ’You cannot play sports wearing shoes that you’d walk around town with.’ So they started making their own. In 1920 Adolph made the first pair of athletics shoes with spikes(钉)，produced on the Dasslers’ kitchen table.
On lst July 1924 they formed a shoe company, Dassler Brothers Ltd and they worked together for many years. The company became successful and it provided the shoes for Germany’s athletes at the 1928 and 1932 Olympic Games.
But i
A. Right
B. Wrong
C. Not mention
[简答题]Recently all sales clerks have been awarded other than John.
（）
