W eight or volume marks are marks indicating the volume or the gross weight or net weight of the package to facilitate loading, unloading or booking shipping space.
【简答题】短文填空。 Long long ago there was an old woman.She made a l 1 by planting f 2 .One daya young man passed by the large beautifulgarden. He was i 3 in these beautifulflowers, and i 4 _ how happy he could be...
【简答题】A dog who chewed off his owner’s infected toe(脚趾)while he was passed-out drunk has been called a lifesaver. Jerry Douthett had been out drinking when his dog Kiko bit off a large part if his big toe. ...
【简答题】称取25mg的蛋白酶粉配制成25ml酶液,从中取出0.1ml,以酪蛋白 为底物用Folin-酚比色法测定酶活力,结果表明每小时 产生1500μg酪氨酸。另取2ml酶液,用凯氏定氮法测得蛋白氮为0.2mg。若以每分钟产生1μg酪氨酸的量为1个活力单位计算,根据以上数据,求:A、1ml酶液中蛋白的含量及活力单位。 B .1g酶制剂的总蛋白含量及总活力。 C . 酶比活力