如图是温度对酶活性影响的曲线,图中A,B两点的催化效率是相等的,以下有关叙述中不正确的是( )
A:酶处于t1温度时的使用寿命比处于t2温度时长
B:酶处于t1温度时的使用寿命比处于t2温度时短
C:处于t2温度时,酶可能开始发生蛋白质变性
D:处于t1温度时,酶分子结构可能比处于t2温度时稳定
“二战”后初期,在国际贸易中处于最强势地位的货币是( )
阅读下面一段文字,完成下列题目。
飞蛾趋光,夸父逐日,所有的事物都在寻找光明、快乐、正面的能量。正能量让萎靡( )不振的你鼓起前进的勇气,正能量让迷wǎng( )无助的你拨开阴mái( ),重见阳光;正能量让自怨自艾( )的你重整旗鼓,东山再起。
根据短文内容,用方框中所给词的适当形式填空。
but, favorite, want, about, hamburger, and, like, often, I, visit
Dear Han Mei,
Thank you for your letter. I ____ China very much. And I ____ to go to China with my parents. We want ____ Beijing. I know something ____ China from your letters. ____. I don't know much about Chinese food. Could you tell ____ something about it?I like ____ and fish very much. You tell me you ____ eat rice, vegetables and chicken. And your ____ food is jioazi. What kind of food ____ drink can I have in China? Please tell me.