— will your brother be back ?—In two weeks.
A:How long
B:How often
C:How far
D:How soon
医生建议因缺少某种元素而患甲状腺肿大的病人多食海带,这是由于海带中含有较丰富的( )
—No. It's not _____. It's Tom's.
读“年太阳辐射总量分布图”,回答下列问题.