新中国第一个世界冠军是 [ ] A．陈镜开 B．容国团 C．许海峰 D．张怡宁

物质氧化性、还原性的强弱，不仅与物质的结构有关，而且还与物质浓度、反应温度等有关。下列各组物质：

①Cu与HNO₃溶液 ②Fe与FeCl₃溶液 ③Zn与H₂SO₄溶液 ④Fe与HCl溶液，

由于浓度不同而发生不同氧化还原反应的是 [ ]

A．①③

B．②④

C．②③

D．③④

A passenger told all air hostess(空姐)that he needed a cup of water to take his 小题1:when the plane just took off. She said to him,“I’ll bring you the water   小题2:  ten minutes."

Thirty minutes later, when the passengerring for service sounded, the air hostess ran ill a hurry .She Was so busy that she 小题3: to bring him the water. As a小题4:.the passenger couldn’t take his medicine in lime. The air hostess hurried over to him with a cup of wale. but he  小题5: it.

After a short while, the air hostess came up to him with a smile,” Could you please tell me what I can do for you, sir? "The passenger turned around without any words. The second time .also with a sweet smile, "Would you like 小题6: I can do for you?” Again the passenger refused.

In the following hours 013.the flight, each time the air hostess passed the passenger, she would ask him 小题7:a smile whether he needed some help or not. But the passenger never replied to her. When the passenger was going to get 小题8:the plane, he asked the air hostess to hand him the passenger's booklet (小册子).She knew that he would write down terrible words about her job.   小题9:still with a smile she handed it to him.

Getting off the plane. the air hostess opened the booklet, and smiled because the passenger wrote,” How can I refuse your twelve sweet    小题10: ?"

父母身体健康，孩子因为挑食而体弱多病，这种变异______ （选项填“可以”或“不可以”）遗传．

教学过程中贯彻直观性教学原则有哪些基本要求？

男性，35岁。突发上腹部剧痛5小时。患者5小时前午餐后突然出现上腹部"刀割"样疼痛，伴恶心、呕吐、腹痛波及右下腹，伴心悸及全身出冷汗，服止痛药无效。发病以来未进饮食、未排尿、便。既往有十二指肠溃疡病史3年，未正规治疗，无药物过敏史及手术、外伤史。无烟酒嗜好。查体：T37.8℃，P110次／分，R26次／分，BP130/80mmHg。神志清楚、消瘦、痛苦面容，屈曲体位。浅表淋巴结未触及肿大，巩膜无黄染，口唇无发绀，心肺检查未见异常。腹式呼吸消失，板样腹，上腹及右下腹明显压痛、反跳痛，肝脾触诊不满意，肝浊音界消失，移动性浊音（±），肠鸣音消失。实验室检查：血常规：Hb120g/L，WBC12.0×10⁹/L，N0.85，Plt280×10⁹/L。要求：根据以上病历摘要，请写出初步诊断、诊断依据（如有两个以上诊断，应分别写出各自诊断依据，未分别写出扣分）、鉴别诊断、进一步检查与治疗原则。