What does the italicized word "ignoble" (in the last sentence) probably mean？
A. Unfortunate.
B. Unsuccessful.
C. Unpromising.
D. Unworthy.
查看答案
An annoying vibration can be caused at the natural resonance of the car's engine mount ______.
A. if the engine moves too fast
B. if the engine's amplitude increases
C. if a tire gets out of balance
D. if a damage occurs in the engine
Which statement is true concerning the Taino？
A. They were enslaved by foreign invaders.
B. They were more warlike than other Indians.
C. They were the most short-lived of all the civilizations.
D. They were buried deep in the dirt or oxygen-poor water.
In which of the following cases is it useful to consider the relationship between the length of an oscillating object and its natural period？
Adjusting the speed of a car.
B. Adjusting a clock pendulum.
C. Adjusting tire balance.
D. Adjusting engine mounts.
A．destructiveB．dissatisfiedC．damagedD．derivative
A. destructive
B. dissatisfied
C. damaged
D. derivative
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