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C Can you imagine a catfish bigger than a boy? There are more than 1,000 kinds of catfish;28 species are found in the United States' lakes and rivers. This huge family has some mighty strange members. Let's meet a few. Walking catfish.Nature's feisty little catfish,found in southern Florida,has an extra lung for breathing on dry land. When its swimming hole dries up,the walking catfish waddles on stiff forward fins in search of another lake or stream.If an enemy attacks,the fish flares(展开)its top and front fins and leaps at the attacker to scare it off. Armored catfish.This catfish has heavy,bony plates protecting its body. The shell makes the fish difficult to bone. To cook it,throw the fish whole into a fire. When it is done,break it open for eating.Some armored catfish are found in Florida,but the 100-pounders live in South America. Rounding out the family of strange catfish are talking catfish,which make growing sound when you pull them from the water;climbing catfish,which move quickly up shore brush in search of food;electric catfish,which can deliver a mild shock;and blind catfish,which settle in the inky blackness of underwater caves.Blind catfish find food through taste buds in their eight whiskers(须). Most catfish have four whiskers on the upper jaw and four on the lower jaw. Sensory holes on these whiskers help the fish smell and taste food even in the muddiest of water.The United States does not have catfish anywhere near the size of those in South America.But in some large U.S,rivers,blue and flathead catties do top 100 pounds. Most of the catfish you are likely to catch will be much smaller,about frying pan size.When you catch one,remember that the top fins and the forward fins have poison glands(腺)at their bases. They can give you painful wounds (…) 63.The purpose of the passage is to___________. A.encourage readers to go fishing for catfish B.inform readers of the world's largest catfish C.describe the unusual characteristics of catfish D.explain different ways to catch a variety of catfish 64.The author talks about the way of cooking an armored catfish to show that A.it has heavy and bony plates        B.it's hard to cook and eat C.it has too many bones      D.it's poisonous inside 65.Which is NOT mentioned about catfish in the passage? A.Its eating habits.                                    B.Its living conditions. C.Its whiskers.                                 D.Its size 66.What may be continued in the last paragraph? A.The author's love for catfish.     B.Where else to catch a catfish. C.The origin of the name “catfish”    D.The safest way to handle catfish
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【简答题】资产负债率是资产总额除以负债总额的百分比。( )
【多选题】最优资本结构是指( )的资本结构。
A.
企业价值最大
B.
加权平均资本成本最低
C.
每股收益最大
D.
净资产值最大
【单选题】最优资本结构是指在( )条件下的资本结构。
A.
企业价值最大、加权平均成本最大、财务风险最小
B.
加权平均资本成本最大,财务风险最小
C.
目标价值最大、价值最大
D.
加权平均资本成本最低、财务风险适度、企业价值最大
【单选题】最优资本结构是指在( )条件下的资本结构。
A.
企业价值最大、加权平均成本最大、财务风险最小
B.
加权平均资本成本最低,财务风险最小
C.
目标价值最大、价值最大
D.
加权平均资本成本最低、财务风险适度、企业价值最大
【单选题】接立杆时,相邻杆接头不得在同步内,且两接头垂直距离应()。
A.
>500 mm
B.
<500 mm
C.
>600 mm
D.
<600 mm
【单选题】最优资本结构是指在( )条件下的资本结构。
A.
企业价值最大
B.
加权平均资本成本最低
C.
目标价值最大
D.
加权平均资本成本最低、企业价值最大
【多选题】关于 JAVASCRIPT 函数, 下列说法正确的是 。
A.
函数是独立于主程序的, 具有特定功能的一段程序代码块
B.
函数可以不用 function 关键字
C.
函数的命名规则同变量命名规则是一样的
D.
函数必须使用 return 语句
E.
函数的调用时直接用函数名, 并给形式参数赋值
【简答题】企业最优资本结构是指在一定条件下使企业自有资金成本最低的资本结构。 ( )
【单选题】最优资本结构是指( )所对应的资本结构。
A.
资金成本最低
B.
加权资金成本率最低
C.
资金成本率最高
D.
加权资金成本率最高
【单选题】接立杆时,相邻两杆的接头不得在同步内,且两接头垂直距离应()mm。
A.
>500
B.
<500
C.
>600
D.
<600
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