题目内容
After turning downwind, the apparent increase in groundspeed could _________ the pilot into attempting to slow down the airplane and cause it to stall.
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To turn back to the runway following an engine failure on takeoff, the pilot should determine the ___________ altitude an attempt of such a maneuver should be made in a particular airplane.
Experimentation at a safe altitude should give the pilot an ___________ of height lost in a descending 180° turn at idle power.
如果在某一体细胞中染色体的数目在二倍体的基础上增加一条可形成
形成含有3种细胞系的嵌合体的可能原因是
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