河北省石家庄市第二十八中学2024-2025学年初一年级开学摸底考试 英语试卷答案,我们目前收集并整理关于河北省石家庄市第二十八中学2024-2025学年初一年级开学摸底考试 英语得系列试题及其答案，更多试题答案请关注本网站

河北省石家庄市第二十八中学2024-2025学年初一年级开学摸底考试 英语试卷答案

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【详解】句意：——汤姆什么时候到达北京？——昨天。
考查动词短语以及特殊疑问句。arrive 到达，不及物动词；arrive in 到达，后可加宾语；got to 到达；reached
到达。助动词 did 后加动词原形，排除 CD；空后有宾语，用 arrive in。故选 B。
30．Everyone should ________ protecting the environment.
A．make sure B．play a part in C．take place D．bring out
【答案】B
【详解】句意：每个人都应该为保护环境出一份力。

C. The Uncommon Development of Blonde Chocolate
D. Blonde Chocolate, a Delicious Treat Created by Mistake
D
A private company is working with the American space agency NASA to develop a new rocket that could greatly reduce space travel times. The engine for such a rocket will be designed to sharply increase the amount of force to speed up space travel and improve rocket efficiency.
The new design, called Pulsed Plasma Rocket (PPR), is being developed by Arizona-based company Howe Industries. The company is currently in the early stages of studying the technology before building working engine models.
In a recent statement, Howe Industries said such rocket technology will be needed to shore up NASA’s plans to send humans to the moon and after that, possibly Mars. The space agency has also set a goal to build a long-term base in space. But one barrier to all these plans is the long travel times necessary with current spacecraft systems. For example, a trip to Mars with existing spacecraft would take at least 200 days each way. Developers of the proposed Pulsed Plasma Rocket have said it could reduce travel time to the Red Planet to about two months each way.
Howe Industries said its new design gives the rocket the ability to reach extremely high speeds to complete “reasonable” space travel times. NASA has described its Space Launch System (SLS) as the most powerful ever built. The agency has said the SLS rocket system is expected to provide nearly 53 N of force during space travel. Developers of PPR say that in addition to a huge increase in force, the new design will provide a “specific impulse (推力)” rate of 5,000. The higher this rate is, the more efficient the rocket system will be.

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