Frapping lines（）.

A.secure the lifeboat in the davits when in the stowed position

B.bring the lifeboat close alongside the rail in the embarkation position

C.give the occupants a safety line when the boat is being lowered from the embarkation level

D.reduce the swinging of the lifeboat at the embarkation level

近代中国第一个领导资产阶级革命的全国性革命政党是（）

A.强学会

B.同盟会

C.华兴会

D.国民党