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The test was ______ than I expected.
Simon ______ tired after working for a long day.
Alice: I will go to Mr. Cano’s party tonight. What can I wear? Sandy: You have to wear ______ there. It’s polite.
Grace: What does the fish smell like? Vicky: ______
Look at the picture. Which is true?
On a hot summer afternoon, ______ is children’s favorite. VEGETABLES
It’s very cold outside. Be sure to wear a ______ to keep you warm.
Look at the picture. What is the most expensive at the stand?
He tried to ________ that he made a mistake, but there was proof.
The police will ________ a crime to find out what happened.
The boss needs to ________ the workers to keep things running smoothly.
Can you help me ________ my clothes so they look good together?
It is helpful to ________ new words when learning a language.
We can ________ the beautiful sunset from here.
I hope to ________ my dream of becoming a doctor.
She had to ________ the party invitation because she was busy.
It is important to ________ a good balance between work and rest.
To keep meat fresh, you need to ________ it.
The price will ________ all extra costs, so you don’t have to pay more.
附圖是地球 46 億年來大氣組成的變化,圖中哪一條曲線可代表大氣中的氧濃度變
附表為地質年代表的一部分,從下列哪一個時期開始,地球大氣中的臭氧含 量已足夠保護陸地上的生物免於紫外線的威脅?
地球形成初期的重力無法有效束縛較輕的某些氣體成分,加上初期隕石密集 【Super 講義】 撞擊地球使得地表溫度逐漸升高,某些氣體容易獲得足夠能量逃離地球,以 解答 A 至於原始星雲氣體成分未能保留下來。試問:上述所介紹氣體成分不包括何 解析 母元素:子元素=1:7=1/8:7/8,母元素的含量變成原本的 1/8(1/2)3,表 者?
解析 太陽系形成的星雲假說認為,雲氣先重力塌縮,點燃核融合反應形成太陽,旋轉 試問該標本的年紀?
早期地球的大氣中不含下列哪種氣體?