婴儿所需要的必需氨基酸有（）。
A.酪氨酸
B.组氨酸
C.丝氨酸
D.甘氨酸
E.牛磺酸
参考答案：B
—Could you please tell me________?
— They’re over there.[ ]
A. where are the restrooms
B. where were the restrooms
C. where the restrooms are
D. where the restrooms were
在窗体上画一个命令按钮，然后编写如下事件过程： Private Sub Command1_Click()For i=1 To 4 X=4 For j=1 To 2 X=x+6 NextNextPrint x End Sub 程序运行后，单击命令按钮，输出结果是
A．12
B．13
C．16
D．17
