关于弹力，下列说法中错误的是（ ） A．相互接触的物体间不一定有弹力 B．只有受

How far is it              China to Canada?[ ]

A. is                              

B. from                     

C. of

伊泰普水电站位于哪两个国家边境？[ ]

A．巴西和巴拉圭

B．巴西和巴拿马

C．美国和加拿大

D．埃及和苏丹

动词填空（写出所给的动词的适当形式）（共5小题；每小题1分，满分5分）

小题1:Seventy-two hours passed . More than one hundred workers remained _____________(trap) in the coal mine, though fifty had been saved.

小题2:_____________________(determine) to get a seat for the concert, he didn’t mind standing in a queue all night.

小题3:The bad weather is reported _____________________(contribute) to the passenger plane crash in Iran on January 9.

小题4:__________________ (experience) many failures, I have the courage to meet all challenges.

小题5: _________________ (examine) twice a year, whether it is a car or a bus or a truck, is the rule that every driver shall obey in this city.

软件由两部分组成，一部分是 【14】 ，另一部分是文档资料。

胃大部切除术后出现上腹饱胀，呕吐食物和胆汁（）

A．吻合口梗阻

B．急性输入段完全性梗阻

C．十二指肠残端破裂

D．倾倒综合征

E．输出段梗阻