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A．A certain chemical in their bodies.
B．The change of certain circumstances around them.
C．A certain temperature.
D．A certain season in the year.
答案
更多“A．A certain chemical in their bodies.B．The change of certain circumstances around them”相关的问题
第1题
According to Professor Morgan, what enables animals to freeze themselves？
A．A certain chemical in their bodies.
B．The change of certain circumstances around them.
C．A certain temperature.
D．A certain season in the year.
第2题
The effect of the chemical in grapefruit on certain medicine might NOT lead to______.
A．breast cancer
B．kidney damage
C．heart block
D．deep vein thrombosis
第3题
A．as a result of
B．considering
C．on purpose
D．whatever
第4题
What kind of company is it？
A．A large international textile company.
B．A large international chemical company.
C．A small textile company.
D．A small chemical company.
第5题
A．as result of
B．considering
C．on purpose
D．whatever
第6题
A. as a result of
B. considering
C. on purpose
D. whatever
第7题
Mr. Cousins attributed the bad chemical changes in his body to______.
A．a severe illness.
B．unhappy thoughts.
C．weak bones.
D．too much sleep.
第8题
By saying "they employ chemical warfare" (Line 4, Para. 2), Bruce Ames means______.
A．plants produce certain chemicals to combat pests and diseases
B．plants absorb useful chemicals to promote their growth
C．farmers use man-made chemicals to dissolve the natural chemicals in plants
D．farmers use chemicals to protect plants against pests and diseases
第9题
Mr. Cousins attributed the bad chemical changes in his body to
A．a severe illness.
B．unhappy thoughts.
C．weak bones,
D．too much sleep.
第10题
Which of the following explanations is given by Jerry Hayes to the phenomenon？
A．Bee-keepers do not understand the honeybee's behavior.
B．A certain type of chemical destroys the honeybee's newels system.
C．Honeybees are infected by unwanted insects.
D．Some crops are poisonous to the honeybees.
