为了避免换挡冲击而损坏变速器齿轮，换挡及改变行驶方向时，应使主离合器处于（）状态。

Last year, the government _______ lots of food _______ that African country again to help the poor people there.

A．gave; for

B．gave; with

C．provided; for

D．provided; with

某建筑采用现浇整体楼梯，楼梯共3层自然层，楼梯间净长6m，净宽4m，楼梯井宽 450mm，长3m，则该现浇楼梯的混凝土工程量为( )m²。

A．2265

B．2400

C．7200

D．7400

—Are these your cousins?

—________[ ]

A. Yes, they aren't    

B. No, these aren't

C. No, they aren't      

D. Yes, these are

A 72-year-old client seeks help for chronic constipation. This is a common problem for elderly clients due to several factors related to aging. Which of the following is one such factor ？（）

A．Increased intestinal motility.

B．Decreased abdominal strength.

C．Increased intestinal bacteria.

D．Decreased production of hydrochloric acid.

电动机绕组断线应（）。

A.停机检查

B.观察情况

C.继续运行