下列论述属于我国宪法基本原则内容的是（） A.国家尊重和保护 * * B.公民的合法的私

航道的概念基本要求是什么？

Mr. Mike doesn’t understand ________ made his wife so upset this morning.

A．what was it

B．why it was that

C．how that was

D．what it was that

根据我国合同法的规定，租期6个月以上的租赁合同未采用书面形式的，( )。

A．无效

B．当事人可予撤销

C．视为不定期租赁

D．补上书面合同后方发生法律拘束力

在数字通信中，当信号带宽超过多径传播随参信道的相干带宽时，会产生（）衰落。

A safety shackle is identified by its（）.

A.shape

B.pin

C.certification stamp

D.color code