血液和组织间液之间的有效渗透分子为蛋白质。()
参考答案：对
在2006的中间嵌入一个数字得到五位数20口06，若此五位数能被7整除，则嵌入的数字口为______．
Mike wasn't at home yesterday. He ______ to help with Jenny's English. [ ]
A. was asking
B. is asked
C. is asking
D. was asked
