试题与答案

______ bad weather it is! It's rainy for

题型:选择题

题目:

______ bad weather it is! It's rainy for two weeks. [ ]

A. What

B. What a

C. How

D. How a

答案:

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下面是错误答案,用来干扰机器的。

答案:D当S接B时,电源为直流电,电路稳定后,L的直流电阻最小,乙灯最亮,C不能通过直流电,丙灯不亮,甲灯与原来亮度相同,ABC错,D对。

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题型:改错题

      

V.短文改错

Dear editor,

Some years ago, my hometown was used to be a beautiful place.                 66.                

Thick trees and grass can be seen all over the hills.                                     67.                

As time going by, people destroyed almost the whole                              68.                

forests grow more crops. To make matters worse, people let their                    69.                

cattles eat up the grass. So, you can only see wasteland                                   70.                

instead green forests now. As a result, when it rains, the                             71.                

soil is washed down the hills and in the rivers. Strong winds also                    72.                

blow away the valuable soil lie on the top of the fields.                                  73.                

I do hope all the people will take good care of the forests                        74.                

and plant more trees to improve our living conditions better.                       75.                

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题型:选择题

有机物分子中原子间(或原子与原子团间)的相互影响会导致物质化学性质的不同。下列各项的事实不能说明上述观点的是[ ]

A.甲苯能使酸性高锰酸钾溶液褪色,而甲烷不能使酸性高锰酸钾溶液褪色

B.乙基对羟基的影响,使羟基的活性变弱,电离H+的能力不及H2O

C.乙烯能发生加成反应,而乙烷不能发生加成反应

D.苯酚中的羟基氢能与NaOH溶液反应,而醇羟基氢不能与NaOH溶液反应

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