StringBuffer bf = new StringBuffer("0123456789");bf.insert(5, "abc");System.out.println(bf);//在控制台上输出。
StringBuffer bf = new StringBuffer("0123456789");bf.insert(5, "abc");System.out.println(bf);//在控制台上输出。
Which one of the following is improper for addressing a patient? A: Li Wei of Bed 5. B: Li Wei , No.10. C: Mr./Mrs. Li. D: Bed 5
Which one of the following is improper for addressing a patient? A: Li Wei of Bed 5. B: Li Wei , No.10. C: Mr./Mrs. Li. D: Bed 5
设\( {\bf{A}} \) 为三阶矩阵，\( { { \bf{A}}^*} \)是\( {\bf{A}} \)的伴随矩阵，且\( \left| {\bf{A}} \right| = 1 \)，则\( \left| {2 { { \bf{A}}^{ - 1}} + 3 { { \bf{A}}^*}} \right| = \)______
设\( {\bf{A}} \) 为三阶矩阵，\( { { \bf{A}}^*} \)是\( {\bf{A}} \)的伴随矩阵，且\( \left| {\bf{A}} \right| = 1 \)，则\( \left| {2 { { \bf{A}}^{ - 1}} + 3 { { \bf{A}}^*}} \right| = \)______
${\bf P}(X=4)=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=2)=\,$ ${\bf P}(X=1)=\,$______
${\bf P}(X=4)=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=2)=\,$ ${\bf P}(X=1)=\,$______
${\rm var}(X)=\,$ ${\bf E}[X]=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
${\rm var}(X)=\,$ ${\bf E}[X]=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
You are going to bed and keep quiet, kids. Our guests will arrive in less than 5 minutes.
You are going to bed and keep quiet, kids. Our guests will arrive in less than 5 minutes.
东风5型内燃机车的制动机型号是（）。 A: JZ-7 B: BS2 C: BF
东风5型内燃机车的制动机型号是（）。 A: JZ-7 B: BS2 C: BF
It is ten o’clock in the morning but he is still____() A: in the bed B: in bed C: on bed
It is ten o’clock in the morning but he is still____() A: in the bed B: in bed C: on bed
Mother often ______ for me. A: makes a bed B: makes the bed C: makes bed
Mother often ______ for me. A: makes a bed B: makes the bed C: makes bed