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【判断题】
磁吸附式末端执行器原理利用吸盘内的压力和大气压之间的压力差而工作。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】Forty years ago people were indifferent to the health of the ocean because ______.
A.
the ocean was immune to any pollution then
B.
they didn't know what would come of if the ocean was deadly disrupted
C.
there was no computer then
D.
there wasn't any problem with the ocean at that time
【单选题】Forty years ago people were indifferent to the health of the ocean because_____.
A.
the ocean was immune to any pollution then
B.
they didn't know what would come of if the ocean was deadly disrupted
C.
there was no computer then
D.
there wasn't any problem with ocean at that time
【单选题】WHY were scientists unable to send instruments deep into the Southern Ocean?
A.
because the ocean is way too big
B.
because a lot of the ocean is icy
C.
because the ocean is warming
D.
because a lot of the ocean is gone
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