皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
World Flight Pilot Linda Finch will take off on March 17, 1997 to repeat one of the most famous flights of all time—Amelia Earhart's 1937 round-the-world journey. The original flight did not end well. In July 1937, near the end of her trip, Earhart's Lockheed 10E airplane suddenly disappeared over the Pacific Ocean. Finch hopes that this time she will have a better chance. Though she is flying an exact copy of Earllart's plane, she will have the latest navigation, communications, and weather-tracking tools. 'Amelia had to navigate by the stars,' an impossible task on a cloudy night, Finch says. Finch, in contrast, will be able to know her exact location—even while flying over the ocean—using the Global Positioning system (GPS). This ring of orbiting satellites continuously transmits radio signals to Earth. To calculate her position, Finch's GPS receiver will measure how long it takes radio signals transmitted from various satellites to reach the plane. Knowing her location is especially important when flying around the equator, as Earhart did. In that region, thunderstorms are dangerous. 'I can't fly through thunderstorms,' says Finch, because, 'the winds moving up and down could break the plane.' And Finch will not be able to fly above the storms because her airplane Electra is not pressurized. That means the plane is not equipped to pump in outside air to make breathing easier at high altitudes. So Finch will fly around storms—or wait for them to pass. But unlike Earhart, Finch will.know what weather is ahead. She will receive regular reports via radar from Naval stations around the globe. Finch will also be in communication with lots of ordinary people—maybe even with you! Through her computer and a satellite link, she will receive and transmit email messages. Finch hopes to touch down at her final stop in Honolulu, Hawaii, in May 1997. What happened to Earhart?
A.
She was successful in her world flight.
B.
Her airplane was blown away by the strong winds over the equator.
C.
She lost her way after failing in.communicating with the Naval station around the equator.
D.
D) Her airplane disappeared while flying over the Pacific Ocean.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】下列( )为出口外汇净收入
A.
FOB成交价
B.
CIF成交价
C.
CFR成交价
D.
EXW成交价
【单选题】紫杉醇是一种抗癌特效药,最早于1962年从太平洋红豆杉的树皮中被发现。一棵生长了两百年的太平洋红豆杉的树皮中最多只能提取0.5克紫杉醇。从紫杉醇的发现到最终商用的三十多年里,许多科学家都做出了不懈的努力。下列说法不正确的是( )
A.
源于动植物的许多有机分子具备特殊的生理活性,因此生物多样性有着积极的意义
B.
紫杉醇价格昂贵,且来源稀少,因此开展其人工合成途径的研究意义重大
C.
太平洋红豆杉的树皮里有紫杉醇,这是大自然的馈赠,可以砍树剥皮提取紫杉醇
D.
从这个例子可以了解到,现代科学研究需要多人合作,并且很可能是漫长的过程
【简答题】上传个人简历的制作
【单选题】下列( )为出口外汇净收入。
A.
FOB 成交价
B.
CIF 成交价
C.
CFR 成交价
D.
均不是
【单选题】工程中常用的()是典型悬浮—密实结构。
A.
沥青混凝土
B.
沥青碎石
C.
排水沥青碎石
D.
沥青马蹄脂碎石
【单选题】工程中常用的( )是典型的密实一悬浮结构。
A.
沥青混凝土
B.
沥青碎石
C.
排水沥青碎石
D.
沥青玛蹄脂碎石
【单选题】工程中常用的()是典型的密实-悬浮结构。
A.
沥青混凝土
B.
沥青碎石
C.
排水沥青碎石
D.
沥青玛蹄脂碎石
【单选题】在图示电路中,R=10Ω,R2=XL。各电流、电压有效值分别为:U=220V,I1=20A,【图片】A。求:(1)容抗XC、感抗XL及电阻R2=( , , )Ω;(2)电流I有效值=( )A,电压U2有效值=( )V。【图片】
A.
1,0.5,0.5,20,20
B.
0.5,1,1,20,20
C.
1,0.5,0.5,20,200
D.
0.5,1,1,20,200
E.
0.5,1,1,10,20
【单选题】下列生药来源于百合科植物的是( )
A.
穿龙薯蓣
B.
白豆蔻
C.
卷丹
D.
天麻
【单选题】Z7-01-08 如图Q_02117所示实线为某电场中的电力线,红色表示等势面,由图可以看出:
A.
B.
C.
D.
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题