题目内容

The airplane will ____________ considerable altitude during the turn and might still be in a bank when the ground is contacted.

A. obtain
B. attain
C. lose
D. drop

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After turning downwind, the apparent increase in groundspeed could _________ the pilot into attempting to slow down the airplane and cause it to stall.

A. mislead
B. lead
C. misunderstand
D. understand

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.

A. highest
B. lowest
C. maximum
D. minimum

Experimentation at a safe altitude should give the pilot an ___________ of height lost in a descending 180° turn at idle power.

A. appropriate
B. approximate
C. approximation
D. application

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

A. 单倍体
B. 三倍体
C. 单体
D. 三体
E. 部分三体

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