【快】英语：1.The tourists were lost in the thick forest,---------

【快】
英语：
1.The tourists were lost in the thick forest,_________they dialled 110 for help at last.
A.and B.but C.so D.or
2."Why not _________ to have a walk with me?"Janet said to Frank.
A.goes out B.go out C.going out D.to go out
3.The _________ of a letter or a book are the ideas and information it contains.
A.contents B.contains C.contests D.concrete
1.一只木箱,静止在水平地面上,下列说法正确的是（ ）
A.木箱所受的重力和木箱对地面的压力为一对平衡力
B.木箱所受的重力和地面对木箱的支持力是一对平衡力
C.木箱所受的重力和木箱对地球的吸引力为一对平衡力
D.木箱对地面的压力和地面对木箱的支持力为一对平衡力