下列说法正确的是( ) A.食盐、醋酸和蔗糖都是电解质 B.纤维素、淀粉和蛋白质

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问题:

下列说法正确的是(  )

A.食盐、醋酸和蔗糖都是电解质

B.纤维素、淀粉和蛋白质都是高分子化合物

C.甲烷和乙烯均可使酸性KMnO4溶液褪色

D.乙酸乙酯和植物油均可水解生成乙醇

考点:电解质、非电解质甲烷乙烯油脂
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       20世纪80年代美国提出“星球大战计划”,西欧制定“尤里卡计划”,90年代克林顿提出建立“信息高速公路”,这些主要说明  [ ]

A.争夺世界的斗争日趋激烈

B.世界大战随时可能爆发

C.资本主义国家为适应第三次科技革命的发展,加强对科技的扶植和资金的投入

D.帝国主义国家展开了军备竞赛

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男,60岁,肥胖。行右股骨外科颈骨折开放复位术,硬膜外麻醉效果不佳改全身麻醉,因声门显露困难反复试插管期间,患者出现室颤。静脉快速诱导后患者突然出现室颤

经复苏后患者仍然昏迷、抽搐,主要原因是()

A.氧供不足

B.脑细胞损伤

C.脑血流量不足

D.脑干受压

E.药物作用

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Part 4


Questions 26-45


·Read the following article and choose the best word for each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.

iPhone Left in Hot Car for Three Hours


The normally peaceful suburban town of Winnetka is still reeling following the news Monday (26) a local resident, whose name is being (27) by police pending a full investigation, left an iPhone unattended for more than three hours in a car (28) in the hot sun.
"Responding to calls from (29) . passersby, who observed the iPhone sitting in a vehicle in the parking (30) of the Westfield Shopping Center, police arrived on the (31) at approximately 4 p.m. and immediately intervened to save the device," said Winnetka police chief Douglas Blaine. "Security cameras have shown that the iPhone had been in the car— with the doors (32) and the windows rolled (33) —since 1 p.m. Due to the tragic and highly emotional (34) of this case, we cannot say any (35) at this time."

A. smashed B. climbed C. broke D. crashed

According to official police records, two officers forcibly (36) into the car at 4:07 p.m. and found the iPhone (37) face down on the dashboard. The iPhone at first showed no (38) of life, but after a tense few seconds, officers were able to wake it and get it to (39) to a series of simple touch commands. Police said that if the iPhone were left in the extreme (40) for any longer, it could have died.
The iPhone was rushed by ambulance to a nearby Apple facility for careful (41) .Miraculously, no damage to its memory, screen, or wireless capabilities was reported.
Upper-middle-class suburbanites from all over the North Shore area have reacted to the near-tragedy with an unprecedented outpouring of (42) . Hundreds of cards and letters have come streaming in, and local talk radio shows have been flooded (43) calls demanding that the iPhone’s (44) be prosecuted. Many have come forward offering to take the iPhone into their custody, and still (45) have donated free downloads, ringtones, and MP3s to the victimized object.

题型:选择题

重大设备事故是指设备的直接经济损失在()。

A.万元以上

B.千元以上

C.千元以上万元以下

D.万元以上十万元以下

题型:选择题

铂金首饰中,若铂金含量低,则其中至少含()的钯或铱等一种或多种铂族元素。

A.1%

B.3%

C.5%

D.10%

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