The passage is chiefly about ______.
A: an effort to protect an endangered marine species
B: the civilian use of a military detection system
C: the exposure of a U. S. Navy top-secret weapon
D: a new way to look into the behavior of blue whales
A: an effort to protect an endangered marine species
B: the civilian use of a military detection system
C: the exposure of a U. S. Navy top-secret weapon
D: a new way to look into the behavior of blue whales
举一反三
- The passage is chiefly about______ . A: an effort to protect an endangered marine species B: the civilian use of a military detection system C: the exposure of a U. S. Navy top-secret weapon D: a new way to look into die behavior of blue whales
- The author's main purpose in writing the passage is to ______. A: compare the consequences of the earthquakes that occurred in the U. S. B: encourage civil engineers to make more extensive use of computers C: outline the history of the development of quake-resistant building materials D: report new developments in constructing quake-resistant buildings
- The most effective way to prevent extinctions for the long term would be A: protecting the endangered species habitat B: capture breeding programs C: paying poachers to refrain from poaching D: removing the predators of endangered species E: instigating feeding programs for endangered species
- According to passage, what is one of the best ways to preserve endangered species?
- A VORTAC is a facility consisting of two components, VOR/DME and TACAN. VOR signals can be used by ______ receivers and TACAN for ______ aircraft. A: civilian, civilian B: military, military C: civilian, military D: military, civilian