A. It increases. B. It stays the same. C. It decreases. D. It first increases then decreases. 相关知识点: 试题来源: 解析 C。解析:随着海拔高度增加,气压会降低。因为随着高度升高,上方空气柱的重量减小。A选项气压是降低而非增加,B选项气压会改变而不是保持不变,D选项气压是持续降低而不是先增加...
20 What causes the air pressure in the lungs to decrease during breathing in? A A contraction of the external intercostal muscles and diaphragm B expansion of the lungs causing a decrease in the volume of the alveoli C outward movement of the ribs and upward movement of the diaphragm D highe...
In an experiment about air pressure, after we pump air into a balloon, what happens to the balloon? A. It bursts. B. It deflates. C. It stays the same. D. It gets bigger. 相关知识点: 试题来源: 解析 D。本题考查气压实验步骤。向气球里打气后,气球会变大。A 选项爆炸不是必然结果;B...
When doing a science experiment about air pressure, what should we pay attention to for safety? A. Make sure the container is sealed well B. Use a very sharp tool C. Stand very close to the experiment setup D. Do it in a windy place 相关知识点: ...
What is air pressure?
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D.KéréwasquitepleasedtowinthePritzkerPrize. 30分钟能力强化组合练(二) 第6页 6 ( )2.WhydoesKéréusuallyusebricksmadeoflocalclayandcement? A.Tomakebuildingsstronger. B.Tokeepcoolinhotweather. C.Toprotectstudentsfromrain. D.Toensurebetterindoorairflow. ( )3.WhatdidNébilaprobablythinkofKéré?swin...
It was caused by a blackout (断电). 1 The traffic lights on the streets also stopped working. Blackouts can happen at any time. It’s important to be prepared for a blackout. Here are a few tips for you. Keep a flashlight in every room of your home. 2 However, if a blackout...
C. Her mother was busy working. 20. What does the speaker mainly talk about? A. Importance of home schooling. B. Mother-daughter relationship. C. A role model in her family. 参考答案及原文 1—5 ACCBB 6—10 ABACB 11—15 CACCA 16—20 BCABB Text 1 【原文】M: Excuse me, I got ...