word “tough” mean?3. What does the underlined word “tough” mean?A. Risky.     B. Busy... in the passage?5. Which part is not included in the passage?A. The organization of the Antarctic scientific ……

gentle electrical signals to bacteria at a specific skin pH level. It prevents the buildup of biofilms (生物膜) –  groups of bacteria that can block medicines and lead to serious infections ……

第21次南极科考为新站选址 CHINA is going to begin its 21st Antarctic study on October 25. A group of 12 scientists will stay in the Antarctic for 150 days. They will go to the highest point ……

NEW YORK: Fringes of the Antarctic ice sheet are melting faster than expected and that floating ice shelves making up the Antarctic land mass are losing up to 40 metres in depth a year. ……

tough ones may manage to survive and pass on these traits to future generations of bacteria... boils down to confusion about viruses and bacteria – the two kinds of *microorganisms that cause ……

to surfaces. By mixing sticky bacteria with an enzyme (酶), the scientists broke down tough plastics... safer by stopping harmful bacteria from growing.Scientists at Rice University in the US have come ……

There are about a billion (十亿) bacteria (细菌) in your mouth right now.There are about a billion (十亿) bacteria (细菌) in your mouth right now.   ……

duck?A. Fried duck carries harmful bacteria.A. Fried duck carries harmful bacteria.B. Fried chicken...;Unlike chickens that cannot swim, ducks live in damp environments, which makes it easier for bacteria ……

在地球的尽头，可爱的企鹅是他的模特。 Qin Weijia is taking a picture of a penguin inthe Antarctic(南极). Is the penguin... to the Antarctic. ……

TEENS对话海洋生物学家TEENS对话海洋生物学家A marine scientist tells  about his research in Antarctic waters.  PAGE 6A marine scientist tells  about his research in Antarctic waters.  PAGE 6 ……

of on Earth, in the Antarctic, we have bacteria,” Pettinelli told National Geographic. “They can be deep ……

December 31, 1984: China’s first scientific research station, the Antarctic Great Wall Station, began to be built. It was completed on February 20, 1985. ……

December 31, 1984: China’s first scientific research station, the Antarctic Great Wall Station, began to be built. It was completed on February 20, 1985. ……

place from the sea.B. It's the highest place in Antarctic.C. Scientists are going to build a new.... Scientists usually go to Antarctica in the winter.____ 5. Antarctic's summer is very warm.____ 6 ……

对人体友好的益生菌。Did you know that there are some bacteria in our bodies that help us? They are called probiotics (益生菌). These bacteria help us stay healthy.Lactic acid bacteria 乳酸菌There are many lactic ……