（单项选择题）关于二级注册建造师执业的说法，正确的是（）。

A．th:with

B．th:block

C．th:form

D．th:field

A．th:value

B．th:name

C．th:with

D．th:block

The thrust from the propeller to the hull of the ship is transferred by .

A.tie rod

B.thrust block

C.bedplate of main engine

D.frame. of main engine

For a propeller direct driven by the engine, _____.

A.the thrust pads are while metal faced on both sides

B.the thrust pads are while metal faced only on the forward side

C.the thrust pads are while metal faced only on the after side

D.intermediate shaft usually supported by a plummer block

物理层定义了『____』资源块和物理资源块。(Physical layer defines『____』resource block and the physical resource block .)

It is easier for students to remember new words if they are designed in () and if they are and again and again in () situations and contexts.

A、context, same

B、context, different

C、concept, difficult

A．A.transmit

B．B.plunge

C．C.penetrate

D．D.filter

A.adjusting the position of the intermediate bearing

B.changing the position of the main engine installation

C.adjusting the center line of the propeller

D.changing the position of the thrust block

The order "Bow thrust stop" means “_____”.

A.Bow thrust full to pert

B.Bow thrust full to starboard

C.No bow thrust revolutions

D.No stern thrust revolutions