首页
登录
职称英语
The rocket engine, with its steady roar like that of a waterfall or a thunde
The rocket engine, with its steady roar like that of a waterfall or a thunde
游客
2025-03-14
15
管理
问题
The rocket engine, with its steady roar like that of a waterfall or a thunderstorm, is an impressive symbol of the new space age. Rocket engines have【76】powerful enough to shoot astronauts【77】the earth’s gravitational pull and【78】them on the moon. We have now become【79】in space.
Impressive and complex【80】it may appear, the rocket, which was【81】in China over 800 years【82】, is a relatively simple device. Fuel that is【83】in the rocket engine changes【84】gas. The hot and rapidly【85】gas must escape, but it can do so only through an opening that faces backward. As the gas is radiated with great force, it pushes the rocket in the opposite direction. [br]
选项
A、in advance
B、before
C、earlier
D、ago
答案
D
解析
ago“在……以前”。该句为which引导的定语从句,意为“中国发明火箭是在距今800多年前”。句中谓语是一般过去时,故应选D。
转载请注明原文地址:https://tihaiku.com/zcyy/3996425.html
相关试题推荐
Weseelightening(beforewehear)thethunderit(causes)becausesoundtravels
(Lostinthought),she(didn’thear)thethunder(tobegin)inthemountains(fa
Theengineis______at6,000revolutionsperminute.A、turninginB、turningoff
(Lostinthought),she(didn’thear)thethunder(tobegin)inthemountains(fa
Thisengineerhasdevotedthe______ofeighteenyearstothework.A、labourB、wo
(Anumber)ofthese(who)(study)engineeringisincreasing(steadily).A、Anumbe
Theengineerisnothappywiththeproject,and______isherboss.A、neitherB、s
(Lostinthought),she(didn’thear)thethunder(tobegin)inthemountains(fa
ARussian-maderocket______aUStelecommunicationssatellite______successful
Therocketengine,withitssteadyroarlikethatofawaterfallorathunde
随机试题
Readthetextbelowaboutagreatgift.Inmostofthelines(34-45)thereisone
当归横切面可见的分泌细胞是A.乳汁管 B.树脂道 C.油管 D.粘液腔
电流由元件的低电位端流向高电位端的参考方向称为关联方向。
慢惊风的病位在A.心脾。肾 B.心肝肾 C.脾肾肝 D.心肝 E.肺脾
消弧线圈中性点电流应小于3A。
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
某化工企业委托外部施工单位对部分生产区域进行拆除作业,拆除区域有动火作业、受限空
设计电动机时,常把最高效率点设在额定功率的()。A、80%~200%
砾质粘土属于()类。A.Ⅰ B.Ⅱ C.Ⅲ D.IV
贺普丁() A.促进肝细胞增殖 B.特异性抑制乙肝病毒DNA多聚酶活性 C
最新回复
(
0
)