【多选题】蒋介石提出“攘外必先安内”政策的原因是( )。
【单选题】American people's idea of mastering Nature can be seen in the following activities ( ).
A.
They moved the American frontier westward.
B.
The construction of dams that hold back the waters of large rivers.
C.
The construction of tunnels that go through mountains.
【单选题】According to the man, ______for the applicant.
A.
mastering a foreign language is necessary
B.
having ambitious ideas about future is important
C.
mastering English is very important
D.
working extra hours is required
【判断题】组合逻辑电路的设计方法和分析方法是一样的。 。
【单选题】American people's idea of mastering Nature can be seen in the following activities ( ).
A.
They moved the American frontier westward.
B.
The construction of dams that hold back the waters of large rivers.
C.
The construction of tunnels that go through mountains.
D.
All of the other three choices are correct.