不定项选择

在固体发动机内弹道性能工程预示中，常用的性能预示的模型是零维和一维内弹道计算模型。

A．错误
B．正确

你可能感兴趣的试题

安全阀作用是支架具有[填空1]和[填空2]。

答案：第1空:可伸缩性第2空:恒定工作阻力

单项选择题

What did Jonda mean by "This is too much, too familiar" (Para. 5)?

A．She had saved many people's lives from similar accidents.
B．She had seen too many similar accidents on this road.
C．This reminded her of the terrible accident involving that teenager.
D．This reminded her of another accident where a car fell into a river.