首页
登录
职称英语
Initial voyages into space introduced questions scientists had never before
Initial voyages into space introduced questions scientists had never before
游客
2025-03-27
42
管理
问题
Initial voyages into space introduced questions scientists had never before considered. Could an astronaut swallow food in zero gravity? To keep things simple, astronauts on the Project Mercury ate foods squeezed out of tubes. It was like serving them baby food in a toothpaste container.
But these early tube meals were flavorless, and astronauts dropped too many pounds. "We know that astronauts have lost weight in every American and Russian manned flight," wrote NASA scientists Malcolm Smith in 1969. "We don’t know why." Feeding people in space was not as easy as it looked.
Floating around in space isn’t as relaxing as it might sound. Astronauts expend a lot of energy and endure extreme stresses on their bodies. Their dietary requirements are therefore different from those of their gravity-bound counterparts on Earth. For example, they need extra calcium to compensate for bone loss. ’A low-salt diet helps slow the process, but there are no refrigerators in space, and salt is often used to help preserve foods," says Vickie Kloeris of NASA. "We have to be very careful of that."
By the Apollo missions, NASA had developed a nutritionally balanced menu with a wide variety of options. Of course, all the items were freeze-dried or heat- treated to kill bacteria, and they didn’t look like regular food.
Today, the most elaborate outer-space meals are consumed in the International Space Station (ISS), where astronauts enjoy everything from steak to chocolate cake. The ISS is a joint venture between the U.S. and Russia, and diplomatic guidelines dictate the percentage of food an astronaut must eat from each country. NASA’s food laboratory has 185 different menu items, Russia offers around 100, and when Japan sent up its first crew member in 2008, about 30 dishes came with him. Due to dietary restrictions and storage issues, astronauts still can’t eat whatever they want whenever they feel like it.
In 2008, NASA astronaut and ISS crew member Sandra Magnus became the first person to try to cook a meal in space. It took her over an hour to cook onions and garlic in the space station’s food warmer, but she managed to create a truly delicious dish: grilled tuna (金枪鱼) in a lemon-garlic-ginger sauce---eaten from a bag, of course. [br] Which of the following is true about the early space meals?
选项
A、They had to be eaten from a bag.
B、They tasted better than they looked.
C、They could not make eating as easy as possible.
D、They were not nutritious enough for astronauts.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/4015184.html
相关试题推荐
Initialvoyagesintospaceintroducedquestionsscientistshadneverbefore
Initialvoyagesintospaceintroducedquestionsscientistshadneverbefore
Initialvoyagesintospaceintroducedquestionsscientistshadneverbefore
Beforethearrivaloftheinternet,computerfileswereexchangedviastorag
Beforethearrivaloftheinternet,computerfileswereexchangedviastorag
Beforethearrivaloftheinternet,computerfileswereexchangedviastorag
Beforethearrivaloftheinternet,computerfileswereexchangedviastorag
Beforethearrivaloftheinternet,computerfileswereexchangedviastorag
Directions:Thereare10questionsinthispartofthetest.Readthepassag
Directions:Thereare10questionsinthispartofthetest.Readthepassag
随机试题
[img]2011q1/ct_etoeicwm_etoeicwtpzj_0011_20112[/img]They’resittingintheboat
Readthefollowingletter.Arethesentences(16-22)"Right"or"Wrong"?Ifthe
Thesectarianclashesoccurredbetween______.[originaltext]MoreChristian
[audioFiles]audio_eusm_j68_001(20082)[/audioFiles]A、TheA41attheDomecorner
水力警铃的保养方法有()。A.检查水力警铃铃声是否响亮 B.清洗报警管路上
名词解释-行动研究法
下列智能变电站500千伏变压器保护告警信息中,哪些属于一般缺陷?()(
对文中划线部分“鸡尾酒”疗法的理解,正确的一项是()。 A对抗禽流感
丙级城市规划编制单位可在全国范围内承担的业务主要包括()。A.20万现状人口
属于原核细胞型的一组微生物是A.酵母菌、淋球菌 B.放线菌、破伤风杆菌 C.
最新回复
(
0
)