词汇与结构 If all efforts to extend the landing gear have failed, and a gear up landing is inevitable, the pilot should select an airport with ________ facilities.
A.
crash and rescue
B.
crash and escape
C.
escape and rescue
D.
rescue and medical
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参考答案:
举一反三
【简答题】If the fire alarm is sounded, all residents are requested to ________ in the courtyard. A) assemble B) converge C) crowd D) accumulate