【简答题】如果一个酶对 A 、 B 、 C 三种底物的米氏常数分别为 K m a 、 K m b 和 K m c ,且 K m a>K m b>K m c ,则此酶的最适底物是 。
【单选题】下列对胸壁结核临床表现的描述中,错误的是()
【单选题】关于性状的原始性和进化性,下列说法错误的是( )。
B.
全缘叶是较原始性状,叶缘有起伏、锯齿等是较进化性状
【单选题】船舶处于静止正浮,当静横倾力矩大于船舶最大静稳性力矩时
【单选题】船舶处于静止正浮,当静横倾力矩大于船舶最大静稳性力矩时:
【简答题】已知函数 ,当 时取得极大值 ,当 时取得极小值,求极小值及其对应的 的值。
【单选题】Which of the following is the most correct statement about price controls?
A.
Price controls always help those they are designed to help.
B.
Price controls never help those they are designed to help.
C.
Price controls often hurt those they are designed to help.
D.
Price controls always hurt those they are designed to help.
【单选题】船舶处于静止正浮,当静横倾力矩大于船舶最大静稳性力矩时 。