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【简答题】
B4U1-TextB.doc Passage Two Questions 1 to 5 are based on the following passage. The largest and most ambitious military expedition in history was the invasion of Normandy in northern France by British, American and Canadian forces that took place in the summer of 1944. Even nature played a role. It took more than a year for military planners to orchestrate ( 精心策划 ) every movement to open up a second front in Europe. This would liberate France and way for the final assault ( 攻击 ) on Germany itself. Everything was controlled, that is, except the weather. D- day, the code name given to the day of invasion, was originally scheduled for 5 June 1944. This date had been arrived at by considering two factors--moonlight and tide. With the arrival of 5 June, the weather was so bad that General Eisenhower, supreme commander of the invasion forces, was forced to postpone the invasion by one day. When he met with his staff to review their options, they were faced with the cruel reality that 6 June did not look much better than the original D-Day. The meteorological (气象的) report gave a thin ray of hope that a lull (平息) in the storm would allow enough time to launch the invasion. Finally, Eisenhower made his decision. "I am quite positive we must give the order," he said. "I don't like it, but there it is. I don't see how we can do anything else." Within hours, an armada of 3,000 landing craft, 2,500 other ships, and 500 naval vessels began to leave English ports. Meanwhile, critical errors by the German side allowed them to be taken completely by surprise. Due to the bad weather, the German navy canceled its usual patrol of the English Channel. Also, a practice drill scheduled for June 6 was called off. The German meteorological services were unaware of the break in the weather. On the eve of the attack, many of the top German leaders were absent from their commands. The airborne attack became confused because of stiff winds and the evasive flying of the transport planes when they encountered anti-aircraft fire. As a result, the paratroopers were scattered over a wide area and most missed their drop zones, some by as much as 20 miles. The naval bombardment began around 5:45 a.m. The air attack followed. Weather conditions had improved, but they were not perfect. Because of poor visibility caused by low cloud cover, it was decided that the bombers would delay the release of bombs 30 seconds to avoid hitting the assaulting troops. As a result, the bombs fell inland and missed their targets. Although the naval bombardment was more accurate, it was not much more effective against the hardened German gun emplacements.
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举一反三
【判断题】由于投资的边际效率小于资本的边际效率,因此,投资边际效率曲线较资本边际效率曲线更为陡峭。()
A.
正确
B.
错误
【单选题】下列关于黄曲霉毒素的说法 错误 的是
A.
在中性和不太强的酸性条件下比较不稳定
B.
AF 为一类结构相似的物质,包括 B1 、 B2 、 G1 、 G2 、 M1 、 M2 、 P1 、 R1 等十几种异构体
C.
在紫外光下产生蓝和绿色荧光
D.
耐高温,在通常的烹调条件下不易被破坏
【简答题】(7-13)请补充源程序空白处,使程序能够正常运行。
【单选题】关于黄曲霉毒素致癌性的叙述中,错误的是()
A.
AFB1的致癌性最强
B.
大白鼠最为敏感
C.
是目前发现的最强的化学致癌物质
D.
可致动物全身各部位肿瘤
E.
主要致动物胃癌
【单选题】药物作用的选择性取决于
A.
药物剂量的大小
B.
药物脂溶性的高低
C.
药物pKa的大小
D.
药物在体内的吸收
E.
组织器官对药物的敏感性
【简答题】(2-2)请补充源程序空白处,使程序能够正常运行。
【判断题】投资的边际效率小于资本的边际效率。
A.
正确
B.
错误
【单选题】下面关于“黄曲霉毒素”说法错误的是
A.
黄曲霉毒素是目前已知的最强致癌物
B.
主要存在于发霉的花生、玉米、豆类、稻米、小米、小麦等粮食、坚果和油类产品中
C.
长时间食用含低浓度黄曲霉毒素的食物只会诱发肝癌
D.
将处理过食物的筷子和砧板及时清洗、并保持干燥对于预防黄曲霉毒素很重要
【单选题】药物作用的选择性取决于
A.
药物脂溶性的大小
B.
药物水溶性的大小
C.
药物剂量的大小
D.
组织器官对药物的敏感性
E.
药物的吸收速度
【单选题】关于黄曲霉毒素的结构和理化特性的描述,错误的是()。
A.
二呋喃环末端有双键的毒性大
B.
耐热,一般烹调方法不能破坏
C.
在紫外光照射下产生荧光
D.
皆溶于水
E.
在碱性条件下,其内酯环易破坏
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