单项选择题

According to the passage, which of the following is TRUE

A．Energy only emits from Sagittarius A.
B．There are many strong energy sources.
C．Energy comes from a black hole.
D．Energy emits from any regions surrounding Sagittarius A.

<上一题目录下一题>

热门试题

单项选择题

Sagittarius A is ______.

A．clearly a super-massive black hole
B．a compact cluster of normal stars
C．a single, small subject
D．still an issue of controversy

单项选择题

The underlined phrase the instinctive American wariness of Washington (Para. 2) implies ______.

A．Americans' deep distrust for the U.S. government
B．Americans' very keen concern about their nation
C．Americans' rising interest in political affairs
D．Americans' dislike of polities