历史上,贝壳、粮食、皮革都曾充当过商品交换的媒介,但伴随着商品交换的发展,贵金属长期占有了货币的宝座。这是由于贵金属( )①化学性质稳定、便于保存 ②可用作装饰品③具有很高的价值 ④质地均匀、便于分割
.—I have a sore neck. -- You should see a doctor. --- ______________.
I walked along the seaside and saw many people _________ on the beach.
—-Lisa has a sore back ? —I think she____ go to a doctor.
The little baby has two new ______?
– My head feels very hot. —Maybe you have a fever. You should _______ your temperature.