患者，男，40岁。因“胃溃疡”做胃大部分切除术，在胃体处可见一约2cmx1cmx1cm大小灰白色结节，向浆膜面凸起，切面质实，灰白色。

镜下观如图，免疫组化CD117如图，病理诊断应为 ( )

A:慢性胃溃疡 B:胃间质瘤 C:淋巴结反应性增生 D:平滑肌瘤 E:以上均不是

我国铁路每公里线路上铺设的轨枕数量，一般在1520～1840根。（）。

A:500根左右 B:1520～1840根 C:3000根左右 D:5000根左右

拉斐尔（1483—1520）

浇注20MnSi钢时，第一包开浇5分钟内中间包温度控制不低于1520℃。

连铸钢水的液相线温度都在1510～1520℃范围内。

用红外光谱法鉴别盐酸普鲁卡因，以下吸收峰的归属是：1604cm^-1，1520cm^-1（）

A:氨基的 B:苯环的νC=C C:羰基的νC=O D:酯基的νC-O E:甲基的νC-H

（）

A:37 B:29 C:27 D:24

Passage Three
Early in the 16th century men were trying to reach Asia by traveling west from Europe. In order to find Asia they had to find a way past South America. The man who eventually found the way from the Atlantic Ocean to the Pacific was Ferdinand Magellan.
Magellan sailed from Seville in August 1519 with five ships and about 280 men. Fourteen months later, after spending the severe winter on the coast of Patagonia, he discovered the channel which is now called Magellan’s Straits. In November 1520, after many months of dangers from rocks and storms, the three remaining ships entered the ocean on the other side of South America.
They then continued, hoping to reach Asia. Before they arrived at these islands, later known as the Philippines, Magellan was killed in battle. The remaining officers then had to get back to Spain. They decided to sail around Africa. After many difficulties, one ship with eighteen men sailed into Seville three years after leaving. They were all that remained of Magellan’s expedition. However, their achievement was great. They were the first men to sail round the world.

A:in August, 1519 B:in October, 1520 C:in November, 1520 D:not mentioned

用红外光谱法鉴别盐酸普鲁卡因，以下吸收峰的归属是

A: B: C: D: E: