Energy projects have been built in over ______ countries since the proposal of BRI.

单项选择题Which option is the most appropriate patterns of salutation in an English letter when you know the recipient’s name and have intimate relationship? ( ) (英文信件中如果知道收信人姓名且关系亲密，下列称呼哪一项最合适？) A、A. August 2, 2018 B、 B. Dear Mr. Bush, C、C. Dear Mary, D、 D. Dear Mrs. Bush,

多项选择题大型斑块的生态功能主要体现在哪些方面？