正确答案: C

1.5倍

题目：一个物体高速运动，初时动能和静能相等。当物体速度继续增大，使动能增大1倍时，总能量增大（ ）

解析：C

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学习资料的答案和解析：

[单选题]These speculations sound ______science fiction.

like

解析：[解析] sound like：听起来像。

[单选题]In March 2004，Joe Ryan got a notice from a billing agency for a hospital near Denver，Colorado. The hospital wanted payment for surgery totaling $41,188. Ryan had never set foot in that hospital. Obviously there was some mistake. “I thought it was a joke，”says Ryan.But when he called the billing agency，nobody laughed. Someone，who's also named Joe Ryan，using Ryan's Social Security number，had indeed been admitted for surgery. He figured clearing this up would take a just few phone calls.

inform. him of the payment for his surgery

解析：解析：细节题。题干大意：收费处给Joe Ryan寄去一张账单是为了……。根据文章第一段第二句“The hospital wanted payment for surgery…”可知是通知他为他的外科手术付款。因此B项是正确选项。

[单选题]安装Windows组件时，复选框中有“√”并且呈灰色，表示该组件

只有部分程序被安装

[单选题]1832年，英国议会通过了______，其结果是扩大了政治普选的权利。( )

《选举改革法》

[单选题]甲和乙订立买卖合同，合同规定，甲应在乙交付货物后10日内付款。乙交付货物经甲检查发现货物完全不符合质量要求，乙于10日要求甲支付货款，甲可以行使______予以抗辩。( )

先履行抗辩权