In August 1977, a satellite to gather data about the 10 million black holes which are thought to be in the Milky Way.
A、launchedB
暂无解析
Hismotherbecomesdisappointedwheneverhefailstoliveuptoher________(expect)
时差反应是每个国际旅行者可能遇到的问题。翻译
Itisessentialthateverythinginadvance.（）
The present crisis bears some ________(similar) to the oil erisis of the 1970s
Althoughtheyagreethatlifeisimportantandshouldberespected,theyfeelthatthequalityoflifeshouldnot__(ignore).
