托福考试

【单选题】
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[*] According to the professor, why is chemistry sometimes called the central science
A．Chemistry courses are the most difficult．
B．Chemical processes occur all around us．
Chemistry students have high status．
D．Chemists study how to control diseases．
网考网参考答案：B
网考网解析：
The professor says Chemistry is sometimes called the central science. This isn’t surprising, since most of the processes going on around us involve chemical changes. She then lists examples of chemical processes. (2.2) document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>