【单选题】Common indoor plants may prove to be a valuable weapon in the fight against rising levels of indoor air pollution. Those【B1】in your office or home are not only【B2】, but NASA scientists are finding the...
【单选题】Common indoor plants may prove to be a valuable weapon in the fight against rising levels of indoor air pollution. Those【C1】______in your office or home are not only【C2】______, but NASA scientists are...
【单选题】What does "this endeavor"in "the energy, the faith, the devotion which we bring to this endeavor will light our country and all who serve it" refer to?
A.
Assuring a more fruitful life for all mankind
B.
Serving the country by doing whatever it asks
C.
d efending when there is er of losing it
D.
Forging a global alliance against the common enemies