【填空题】
2.>负荷开关在断开位置时，像隔离开关一样有明显的___，因此也能起隔离开关的隔离作用。
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【简答题】
The French retreat turned into a nightmare. From fields and forests, the Russians launched hit-and-run attacks on the French. A short distance from Moscow, the temperature had already dropped to minus 4 degrees Celsius. On November 3, the winter's first snow came. Exhausted horses fell dead in their tracks. Cannon became stuck in the snow. Equipment had to be burned for fuel. Soldiers took ill and froze to death. The French soldiers dragged on, leaving the dead along every mile.
【简答题】
As the Russian army was gathering its strength, the French had to flee Russia to avoid certain defeat. At the Berezina River, the Russians nearly trapped the retreating French by burning the bridges over the swollen river. But Napoleon, by a stroke of luck, was able to build two new bridges. Thousands of French soldiers escaped, but at the cost of fifty thousand dead. Once across the Berezina, the tattered survivors limped toward Vilna.
【简答题】
Of the six hundred thousand soldiers Napoleon had led into Russia, less than one hundred thousand came back. The weakened French army continued its retreat westward across Europe. Soon, Britain, Austria, Russia, and Prussia formed a powerful alliance and attacked these stragglers. In March 1814, Paris was captured. Napoleon abdicated and went into exile, his empire at an end.
【简答题】
By early 1941, Adolf Hitler, leader of Nazi Germany, had seized control of most of Europe. To the east of Hitler's German empire was the Soviet Union. On June 22, 1941, without a declaration of war, Hitler began an invasion of the Soviet Union that was the largest military land campaign in history. Confident of a quick victory, Hitler expected the campaign to last no longer than three months. He planned to use the blitzkrieg, or "lightning war," tactics that had defeated the rest of Europe. The invasion had three broad thrusts: against Leningrad and Moscow and through the Ukraine.
【简答题】
Caught off guard by the invasion, Soviet leader Joseph Stalin instructed the Russian people to "scorch the earth" in front of the German invaders. Farms and factories were burned, destroyed, or rendered useless. During the first ten weeks of the invasion, the Germans pushed the front eastward, and the Russians suffered more than a million casualties.
【简答题】
In the north, the Germans closed in on Leningrad. Despite great suffering, however, the people of Leningrad refused to surrender. As the battle of Leningrad dragged on into winter, the city's situation became desperate. As food ran out, people died from hunger and disease. By the middle of the winter of 1941-1942, nearly four thousand people starved to death every day. Close to one million people died as a result of the siege.
【简答题】
In the center of Russia, Hitler's goal was the capture of Moscow. Because the Germans had anticipated a quick victory, they had made no plans for winter supplies. October arrived with heavy rains. "General Mud" slowed down the movement of the Germans' lightning attack.
【简答题】
As Hitler's armies drew closer and closer to Moscow, an early, severe winter settled over the Soviet Union, the harshest in years. Temperatures dropped to minus 48 degrees Celsius. Heavy snows fell. The German soldiers, completely unprepared for the Russian winter, froze in their light summer uniforms. The German tanks lay buried in the heavy snowbanks. The Russian winter brought the German offensive to a halt.
【简答题】
By the summer of 1942, Hitler had launched two new offensives. In the south, the Germans captured Sevastopol. Hitler then pushed east to Stalingrad, a great industrial city that stretched for 48 kilometers along the Volga River. Despite great suffering, Soviet defenders refused to give up Stalingrad.
【简答题】
In November 1942, the Russians launched a counterattack. With little or no shelter from the winter cold in and around Stalingrad, German troops were further weakened by a lack of food and supplies. Not until January 1943 did the Germans give up their siege. Of the three hundred thousand Germans attacking Stalingrad, only ninety thousand starving soldiers were left. The loss of the battle for Stalingrad finally turned the tide against Hitler. The German victories were over, thanks in part to the Russian winter.
【简答题】
During 1943 and 1944, the Soviet armies pushed the German front back toward the west. In the north, the Red Army broke the three-year siege of Leningrad with a surprise attack on January 15, 1944. Within two weeks, the heroic survivors of Leningrad saw their invaders depart. By March 1944, the Ukraine farming region was again in Soviet hands. On May 9, 1944, Sevastopol was liberated from the Germans. The Russians were now heading for Berlin.
【简答题】
For Hitler, the invasion of the Soviet Union had turned into a military disaster. For the Russian people, it brought unspeakable suffering. The total Soviet dead in World War II reached almost 23 million.
【简答题】
The elements of nature must be reckoned with in any military campaign. Napoleon and Hitler both underestimated the severity of the Russian winter. Snow, ice, and freezing temperatures took their toll on both invading armies. For the Russian people, the winter was an icy defender.
【单选题】
病媒生物的死体样本运送，如果4h-24h内能到达实验室的，应将样品置于-30℃冷冻后再送样，运送过程中箱内温度应保持在________。___
A. 4℃以下
B. 0℃以下
C. -20℃以下
D. 4℃以上
【单选题】
对于用作虫媒病毒分离或检测的蚊类标本，现场采集后应采用_______方式处置和运送。___
A. 杀虫剂熏杀+常温运输
B. 等蚊虫自然死亡+常温运输
C. 冷冻处死+常温运输
D. 冷冻处死+冷冻状态运输
【单选题】
截获输入性活鼠或来自鼠疫流行区死鼠及经总署专家组确认和复核属于全国口岸首次截获的病媒生物应在______报告总署。___
A. 2小时之内
B. 8小时之内
C. 12小时之内
D. 24小时之内
【单选题】
入境船舶的蚊类和蝇类等双翅目病媒生物监测调查应白天在检疫锚地停泊期间进行，锚位距陆地距离不少于______，或在船舶靠泊后_____内进行。___
A. 1000 m；1h
B. 800 m、2 h
C. 400 m、4 h
D. 100 m、24 h
【单选题】
在国境口岸或者交通工具上发现______有反常死亡或者死因不明的，国境口岸有关单位或者交通工具的负责人，必须立即向卫生检疫机关报告，迅速查明原因，实施卫生处理。___
A. 蚊类
B. 鼠类
C. 蝇类
D. 蜚蠊
【单选题】
_________鉴别特征是：体型较大，前胸背板具褐色蝶形大斑，其后缘中央向后延伸不达后缘，且前缘具“T”型黄斑。___
A. 黑胸大蠊
B. 美洲大蠊
C. 德国小蠊
D. 褐斑大蠊
【单选题】
_________鉴别特征是：中胸侧板有垂直的侧板杆，无颊栉和前胸栉，后头鬃2列，前足第5跗节具3根刺形亚端腹鬃，受精囊为“C”型。___
A. 人蚤
B. 二齿新蚤
C. 印鼠客蚤
D. 犬栉首蚤
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