“播共和龙种，收专制跳蚤”这一评论所反映的历史进程是（） A．从金田起义到天京变

阅读理解。

John is an American boy. His family is in China now. John likes chocolates (巧克力) very much. But his mother doesn't give him. They are not good for him, she thinks. But John has a very nice uncle. The old man loves him very much, and sometimes (有时) buys John some chocolates. Then his mother lets him eat them. She wants to make the old man happy. One Sunday evening he says in his room,"Please, God (上帝) makes them give me a big box (盒子) of chocolates tomorrow; it's my eighth birthday." His mother says, "God can't hear you, my boy." "I know, but my uncle is in the next room, and he can hear."

1. John likes ______ very much.

[ ]

A. reading books B. eating C. chocolates D. playing

2. What day is John's birthday? On ______.

[ ]

A. Sunday B. Monday C. Tuesday D. Friday

3. Where's John's uncle on that day?

[ ]

A. In the factory B. On a farm C. In the classroom D. In the next room

下表是不同溶质质量分数的硫酸溶液和氨水与其相应密度的对照表

溶液中溶质的质量分数	4%	12%	16%	24%	28%
硫酸溶液的密度（20℃）/g•mL	1.02	1.08	1.11	1.17	1.20
氨水的密度（20℃）/g•mL	0.98	0.95	0.94	0.91	0.90

请你仔细分析上表中的数据，回答下列问题：

（1）从上表可以看出，硫酸溶液的密度大于水的密度，而氨水的密度则小于水的密度．除此以外，你还能够总结出溶液密度与其溶质的质量分数的变化规律是______．

（2）试从物质定量组成（氨水的溶质为NH₃）的角度分析，为什么这两种溶液密度与其溶质的质量分数之间存在这种变化规律？______．

某大型泵站工程进行主泵房底板土方开挖，因工程施工需要监理人签发了设计修改图，但不属于变更范畴，其相关资料如表1F420050—6所示，则最终发包人应向承包人支付的主泵房底板土方开挖的价款应为（）万元。

A.112

B.108

C.110

D.220

下列适用简易计税方法的情形有（）

A、一般纳税人销售其2016年4月30日前取得（不含自建）的不动产

B、一般纳税人销售其2016年4月30日前自建的不动产

C、一般纳税人为建筑工程老项目提供的建筑服务

D、一般纳税人出租其2016年4月30日前取得的不动产

为防止钻孔施工过程中发生机械伤人事故，施工前须将钻机摆放平稳，打牢压车柱，吊好风水管和电缆，作业场所周围必须加强巷道的支护，严禁（）。

A、空帮

B、空帮空顶

C、空顶

D、打锚索