Scientists used to explore on the surface of the ocean.(46). They want to know about the ocean water and the plant and animal life deep in the ocean.
In 1934, the scientist William Beebe dived 3,000 feet below the surface in a hollow steel ball. In 1935, Auguste Piccard dived 10,330 feet. In 1960, his son Jean dived to a depth of 35,800 feet.

A.(46).
B.
C.
D.
E.(49).
F.(50).
G.
(46)
H.
I.
J.
K.
L.
M.
(47)
N.
(48)
O.
(49)
P.
(50)
Q.


【参考答案】

问题 1 解析：
D ；联系上下文，上文提到“科学家们过去常在海洋表面考察”，下文“他们想知道海水及海洋深处的动......

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