给下面的字选择正确的读音。

de    dí

的____确

如果a×b=2，那么a和b成____比例。

    Nearly 610,000 Chinese students attended schools and colleges overseas in 2017. China remains the world's ____ (large) supplier of international students. A majority____the students went to European and North American countries. Countries____ (include) in the Belt and Road Initiative (B&R) became new destinations, with student numbers ____ (rise) by 15.7 percent in 2017. At the same time, about 480,000 graduates returned to China. Since 1978, about 5.2 million Chinese____ (study) abroad and among those ____ graduated about 83.7 percent returned to China.

    Meanwhile, a total of 490,000____ (foreign) from 204 countries and regions studied in China is 2017. Students from the Republic of Korea, Thailand and Pakistan were the most numerous, while the United States ranked ____ (four). Students from B&R countries accounted for 64.9 percent of____ total. About 59,000 international students in China ____(support) by Chinese government scholarships.

唐代诗人皮日休有诗云“尽道隋亡为此河，至今千里赖通波。”开凿“此河”的皇帝是（    ）

有人说，英法发动的第二次鸦片战争是“海盗式的扩张”，给中国文化和人类文明带来不可估量的损失。以下各项最能说明这一点的是（    ）