同型半胱氨酸是氨基酸的代谢中间产物，此氨基酸是（）。
A.甲硫氨酸
B.精氨酸
C.酪氨酸
D.苯丙氨酸
E.亮氨酸
参考答案：A
Besides ______, she is kind and considerate.
a. pretty and clever b. being pretty and clever
c. her pretty and clever d. she is pretty and clever
我国有文字可考的历史从夏朝开始。[ ]
b. being pretty and clever