【简答题】已知 ,若存在不同的实数 使得 ,则 的取值范围是
【单选题】已知一个类属性的名字是__id,则该属性是( )。
【单选题】不会发生移植物抗宿主反应(GVHR)的是
【多选题】Which of the following statement is correct concerning Huntington’s disease?
A.
It is caused by buildup of an abnormal protein.
B.
It is an inherited nerve disorder that causes a degeneration of brain cells.
C.
Over years, large areas of nerves at the front and sides of the brain are destroyed.
D.
Early signs include mood swings, depression and irritability.
【单选题】Protein degeneration is due to( )
A.
Changes in amino acid sequence
B.
Changes in amino acid composition
C.
Breaking of peptide bonds
D.
Destruction of protein spatial conformation
【多选题】【试题】根据《会计法》的规定,单位出纳人员不得兼任的工作有( )。
【简答题】已知向量 . 是否存在实数 若存在,则求出x的值;若不存在,则证明之