【单选题】(单选)欧拉-后差格式是( )的,稳定性条件为( )。
【判断题】大豆的花冠为蝶形花冠,紫荆的花冠为假蝶形花冠。
【判断题】大豆为豆科植物,花冠为蝶形花冠,雄蕊常为二体雄蕊。
【判断题】大豆为蝶形花科植物,花冠为蝶形花冠,雄蕊常为二体雄蕊。
【单选题】Why does the author mention Joseph Pulitzer and William Randolph Hearst?
A.
They owned major competitive newspapers.
B.
They published comic strips about the newspaper war.
C.
Their comic strips are still published today.
D.
They established New York's first newspaper.
【单选题】在商务拜访中是需要讲究礼仪的,下列选项不合适的是( )