题目内容
（请给出正确答案）
A、The maps they were using were not correctly drawn.
B、They didn’t have an efficient way to determine longitude.
C、The clocks at that time were not accurate so they couldn’t find the correct latitude.
D、The ships at that time were not easy to navigate.
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“Why did the great captains of the Age of Exploration get lost at sea？”相关的问题
A) airs B) attentions C) looks D) spirits
High technology _76_ the most startling advances in helping the elderly . In _77_ to the well-known artificial heart implantation, there are efforts underway to _78_ artificial lungs , livers , and bones . An electric ear is _ 79_ seventy-five percent effective . The implants will _80_ better medical care by _81_ minute does of drugs into the body continuously .
For the older people ,even the simplest tasks can be difficult , _82_ impossible to perform. . American business have responded _83_ their needs with a _84_ of inexpensive but useful _85_ Companies have designed extra-efficient can openers that _86_ people whose hands have become _87_ weak to open cans easily . There are devices that allow people to pull on a pair of socks _88_straining their backs . Combs with long handles and U-shaped back brushes are _89_ for those who can not reach as _90_ as they could when they were young .
71. A) Seeing B) Meeting C) Facing D) Matching
72. A) chance B) challenge C) call D) change
73. A) valuable B) comprehensive C) considerate D) considerable
74. A) how B) why C) who D) whom
75. A) with B) to C) upon D) for
76. A) protects B) profits C) proclaims D) promises
77. A) relation B) contrast C) addition D) proportion
78. A) discover B) promote C) assemble D) develop
79. A) thus B) still C) already D) yet
80. A) permit B) persist C) serve D) pursue
81. A) removing B)releasing C) relieving D) replacing
82. A) always B) usually C) eventually D) sometimes
83. A) to B) at C) with D) on
84. A) set B) variety C) series D) group
85. A)production B)produce C) products D) sales
86. A)enable B) make C) cause D) encourage
87. A) so B) very C) too D) rather
88. A) by B)without C) in D) through
89. A) valuable B) ready C) near D) available
90. A) long B) good C) far D) much
A、15 miles.
B、1000 miles.
C、It depends on the speed the ship is sailing.
D、It depends on the ship’s distance from the Equator.
A、Many technical spin-offs of materials and technology.
B、Encouraging breakthroughs.
C、Keeping up with space technology in case of the use of weapons in space
D、Solving the lacking of natural resources.
A、The Call of the Wild
B、The Sea-Wolf
C、Martin Eden
D、The Old Man and the Sea
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