Which of the following does the passage mention as necessary for both the production of oxygen by photodissociation and the production of oxygen by plants?
A.
Water
B.
Hydrogen
C.
Carbon dioxide
D.
Nitrogen
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【单选题】如果餐厅座位已满,需客人等待时,你该如何礼貌的表达?
A.
I’m sorry, there is no seat now. Please wait a moment.
B.
I’m sorry, no seat now. Please wait for a moment.
C.
I’m sorry, there are no vacancies left now. Would you like to wait for a moment?