Ⅰ型糖原累积病,其发病机制最主要是
A.肝、肾细胞缺乏葡萄糖6-磷酸激酶B.肌磷酸化酶缺乏C.肝磷酸化酶缺乏D.磷酸果糖激酶缺乏E.垂体前叶分泌生长激素缺乏
参考答案:A
神是怎样生成的?
Now, the world’s focus is all on Shanghai ______ the 2010 world Expo is to be held.
A.when
B.whose
C.where
D.that