The tympanic membrane receives sound waves and vibrates. The three bones compose of the auditory ossicles work at the same time to transmit sound waves to the inner ear.

力学对土木工程发展没有任何用处。 A、正确 B、错误

单项选择题力学对土木工程发展没有任何用处。
A、正确
B、错误

Concessional loans generally include ________, ________...

多项选择题Concessional loans generally include ________, _________ or both. ( ) A. below-market interest rates B. grace periods C. debt payments D. grant aid

传统流程图中的判断用（    ）表示。A．平行四边形框 B．菱形框 C．矩形框 D．椭圆形框

单项选择题传统流程图中的判断用（    ）表示。