A．BecauseB．HenceC．AndD．But
A. Because
B. Hence
C. And
D. But
查看答案
The word "precedents" (Line 1,Para. 4) probably refers to ______.
A. early acts for men to follow as examples
B. particular places for men to occupy especially because of their importance
C. things that men should agree upon
D. men's beliefs that everything in the world has already been decided
The author of this passage probably intended to explain ,______.
A. exactly how radar works
B. why the British used radio waves in their device
C. how radar(word and device)came to be
D. how radar helped the British win the Battle of Britain
A．forB．inC．toD．by
A. for
B. in
C. to
D. by
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