混合离子交换树脂的鉴别中，硫酸铜的溶液需要酸化，其目的是防止（）树脂与Cu2+络合，

关于骨盆狭窄的概念，正确的是（）

A．骨盆入口狭窄者可给试产机会

B．骨盆入口横径小于10cm为扁平骨盆

C．胎头低于耻骨联合平面称跨耻征阳性

D．骨盆入口狭窄是导致持续性枕横位的主要原因

E．骨盆出口横径与出口后矢状径之和为14cm可 * * 分娩

（1）下图是碳原子结构示意图，碳原子的质子数是            ，碳元素在元素周期表中位于第               周期，形成的最简单的有机物的化学式为　　　      。

（2）上图是A、B两种物质的溶解度曲线，请回答：

①t3℃时，两种物质溶解度的大小关系为A                 B；

②t3℃时，把30g固体A放入50g水中，充分溶解后可得到A的              溶液（填饱和、不饱和）；

③在其他条件不变的情况下，若把t1℃时A、B的饱和溶液分别升温至t2℃ ，此时两种溶液中溶质的质量分数关系为A                        B(填＞、＜或＝）。

(A)

One day Walt Disney had a vision. It was a vision of a place where children and parents could have fun together. The more Walt dreamed of a "magical park," the more imaginative and elaborate it became.

The original plans for the park were on 8 acres next to the Burbank studios where his employees and families could go to relax. Although World War lI put those plans on hold. During the war, Disney had time to come up with new ideas, and creations for his magical park. It was soon clear that 8 acres wouldn’t be enough.

Finally in 1953, he had the Stanford Research Institute conduct a survey for a 100-acre site, outside of Los Angeles. He needed space to build rivers, waterfalls and mountains; he would have flying elephants and giant teacups; a fairy-tale castle, moon rockets and a scenic railway; all inside a magic kingdom he called "Disneyland".

The search for the best venue for the park ended in the rural Anaheim, California with a purchase of a 160-acre orange grove near the junction of the Santa Ana Freeway (1-5) and Harbor Boulevard.

Construction for Disneyland began on July 21, 1954, 12 months before the park was scheduled to open.

Some 160-acres of citrus trees had been cleared and 15 houses moved to make room for ’the park. However, when the real designing came around, Disney met with inevitable questions. How do you make believable wild animals, that aren’t real How do you make a Mississippi paddle ship How do you go about building a huge castle in the middle of Anaheim, California Disney asked his movie studio staff for answers. The design of Disneyland was something never done before. There would be four uniquely different theme parts: Adventureland, Frontierland, Fantasyland,Tomorrowland. Bit by bit, Disneyland got ready for opening day. The staff worked around the clock to get ready.

But opening day was a terrible disaster. Beside the terrible opening day conditions, the park did eventually pick up. By 1965, ten years after opening day, 50 Million visitors had come through the gates.

The passage is mainly about（）。

A. What visitors can enjoy in Disneyland

B. The difficulties Disney met in building Disneyland

C. How Disneyland came into being

D. A brief introduction to Disneyland

根据周琦老师所讲，高德地图有哪些功能（）

A.为用户搜索地点

B.交通路况实时播报

C.避堵路线方案规划

D.智能计算到达目的地所需的时间

有学者指出：如果说文艺复兴为人本主义者们“清理了场地”，那么启蒙运动则是“大兴土木”。这里的“大兴土木”是指（）

A.摧毁蒙昧和专制主义

B.构建民主法治社会

C.弘扬理性和科学思想

D.建设工业文明国家