在实验室可用如图所示装置制取蒸馏水．回答下列问题：

1）写出下列仪器的名称．

b ____；d ____；

（2）得到的蒸馏水在 ____中．

（3）仔细观察d仪器，它起到 ____作用；冷水进入d仪器的方向如图所示，如果改为从上端流入，下端流出行不行？ ____（选填“行”或“不行”），其原因是 ____．

    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.