航海英語固體散裝危險品與BC規(guī)則單項選擇題每日一練(2019.01.10)

來源：考試資料網(wǎng)

1 An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.

2 An example of a grade B product is（）.

3 Antiseptics are used principally to（）.

4 After you enter the Ohio River at Cairo，which span of the Illinois Central RR Bridge would you select to pass under? （）

5 According to the Chemical Data Guide，epichlorohydrin is a(n)（）.