A.氧气瓶 | B.水下呼吸器 | C.救生衣 | D.防护服 |
A.Australia | B.France | C.the USA | D.Canada |
A.4 | B.6 | C.8 | D.10 |
A.Because they were picked up. |
B.Because they were eaten by fish. |
C.Because they grew old. |
D.Because the sea water was polluted. |
A.Jacques Cousteau and the Scuba Machine |
B.Scuba-diving |
C.The Beautiful Coral Reels |
D.The Wonderful World Under the Sea |